Ranch stock tank fully covered with modular floating cover units, with beef cattle grazing on open rangeland behind it under a summer sky
Industry Solution

Floating Covers for Ranches & Farms — Stop Evaporation, Cut Water Hauling, Protect Livestock Water

Keep up to 98% of the water you already have. Modular covers for stock tanks, ranch ponds, and storage reservoirs — no earthwork, no power, no anchoring.

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Ranchers are not short of land — they are short of water. Evaporation quietly removes three to four feet of depth per year from open stock tanks and ponds across the arid West, and when those ponds go dry the only remaining option is hauling. Operations in the Upper Colorado Basin have reported eight truck trips across three vehicles over nine hours just to water 800 cow-calf pairs, in a year with the worst snowpack on record for the basin. USDA ELAP reimburses about $0.10 per gallon hauled while real delivered cost commonly runs $0.15–$0.20 per gallon — and it does not pay for the water itself. Every gallon kept in the tank is a gallon that never needs a truck.

Modular floating covers — the family that includes the shade balls (Armor Ball® modular covers) most ranchers already know, plus the Rhombo Hexoshield® panels VaporLok sells as Rhombos — are the cheapest water a ranch can buy, because the water is already there. A multi-year New Mexico stock-tank trial measured more than 81,000 gallons of net evaporation from an uncovered 20-foot tank versus fewer than 20,000 gallons from an identical covered tank, and reported no algae or moss growth and markedly less ice on the covered surface. Advanced Water Treatment Technologies (AWTT) manufactures the full range — Armor Ball®, Armor Ball® AQUA 275, Hexprotect® AQUA, and Rhombo Hexoshield® 66 — delivering that effect at ratings from 90% up to 98% evaporation reduction and up to 99% surface coverage — with no earthwork, no power, no anchoring, and no moving parts. Livestock drink straight through the cover; the modules part at the muzzle and close again on their own.

The same barrier does three more jobs at once. It blocks the sunlight that drives blue-green algae — the toxin blooms that killed 24 of 175 heifers in one documented southern Colorado incident. It improves the drinking water quality that shows up on the scale, where research found heifers on clean water gained 23% more than animals watering directly from a pond. And it slows heat loss in winter, cutting ice formation and the daily chore of chopping it. Use the AWTT ranch pond evaporation calculator to put a gallon figure on your own tanks before you spend anything.

Manufactured By & Sold Through

VaporLok Technologies — Our Farm & Ranch Partner Under 1,000 sq ft

VaporLok Rhombos are Rhombo Hexoshield® modular covers manufactured by Advanced Water Treatment Technologies (AWTT), a US manufacturer with 700+ installations across 25 countries since 2004. The two names describe the same cover: AWTT builds it, and VaporLok Technologies sells and deploys it on farm and ranch water.

VaporLok Technologies is AWTT's authorized partner for farm and ranch projects covering less than 1,000 square feet of water surface — which covers most stock tanks, storage tanks, and small ranch ponds. VaporLok has been deploying modular covers on livestock water since 2016, operates across ten states, and carries ranch-scale inventory and local know-how that a factory order cannot match at that size.

For projects of 1,000 square feet and larger — large stock ponds, irrigation reservoirs, ranch water storage impoundments, and multi-site programs — the quote is issued by Advanced Water Treatment Technologies (AWTT) in partnership with VaporLok Technologies, and the cover ships factory direct from our North American plants to your site. Taking the extra handling out of the chain is what makes the pricing sharper at volume, and you still get engineered product selection, third-party wind and load documentation for cost-share and permit paperwork, and VaporLok's support on the ground.

Modular floating cover installed on a windmill-fed ranch stock tank, covering the full water surface to stop evaporation
Rhombo Hexoshield® modular floating covers for farm and ranch at VaporLok Technologies

Projects under 1,000 sq ft. Stock tanks, storage tanks, and small ranch ponds — ranch-scale inventory and regional support.

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Projects 1,000 sq ft and larger. Quoted by AWTT together with VaporLok and shipped factory direct — sharper pricing at volume, with full specification documentation.

Related Engineering Guides

The Cost of Water Shortage on Ranches

The full 2026 analysis behind this page — what evaporation and hauled water actually cost, a sourced savings model with the payback table, and an explicit account of what a cover does not fix.

Ranch Pond Evaporation Calculator

Enter your pond or tank dimensions and location to get daily and annual evaporation loss in gallons, plus the savings a cover would deliver on your site.

Floating Covers for Agriculture

The full agricultural guide — irrigation reservoirs, stock ponds, and lagoons, with payback analysis and installation guidance.

Shade Balls — Industrial Spec

What separates an engineered industrial shade ball from a commodity plastic sphere: resin, wall thickness, ballast, and wind rating.

Evaporation Control Solutions

How modular covers suppress evaporation, what coverage density is required, and how to compare product families.

Common Ranch Industry Challenges

Uncovered water storage creates measurable operational, environmental, and compliance risks specific to ranch facilities.

Evaporation Takes the Water Before the Herd Does

Across West Texas, eastern New Mexico, and the arid Southwest, open water surfaces lose three to four feet of depth per year to evaporation — more in the driest counties. A three-year New Mexico field trial measured more than 81,000 gallons of net evaporation from a single uncovered 20-foot stock tank. That is water you already paid to pump, haul, or impound, lost to the sky.

Hauling Water Is the Most Expensive Gallon on the Ranch

When ponds go dry the truck comes out. Operations in the Upper Colorado Basin reported running eight trips with three vehicles over nine hours to water 800 cow-calf pairs. USDA ELAP reimburses roughly $0.10 per gallon hauled, while real delivered cost commonly runs $0.15–$0.20 per gallon once fuel, labor, and truck time are counted — and the water itself is not covered.

Blue-Green Algae Can Kill a Herd in Under 24 Hours

Warm, still, nutrient-rich stock ponds bloom cyanobacteria that produce neurotoxins and hepatotoxins. Documented incidents include 24 of 175 heifers lost to a Microcystis bloom in southern Colorado and nine head lost in central North Dakota. Death typically follows ingestion within hours, and there is no practical treatment — only prevention.

Poor Water Quality Costs Real Pounds

Water quality shows up on the scale. Willms et al. reported heifers with access to clean water gained 23% more than animals drinking directly from a pond, and an earlier trial found a 20% weight-gain penalty for yearling steers watering from dugouts over 70 summer days. Algae, silt, and manure loading all suppress voluntary intake, and intake drives gain.

Winter Ice Shuts Off the Water Supply

Ice caps tanks and ponds exactly when cattle need consistent intake to hold condition. Chopping ice is daily labor, propane and electric tank heaters add cost at remote sites, and freeze-thaw cycling shortens the life of tanks, valves, and float assemblies. Reduced winter intake means reduced feed intake and lost body condition score.

Wells and Aquifers Are Not Keeping Up

In parts of the Texas Panhandle the Ogallala has dropped more than 200 feet since large-scale irrigation began, with average saturated thickness down to roughly 51 feet and a further 0.66-foot average decline recorded in 2025. Drilling a replacement 500-foot well runs about $20,000. Conserving surface water you already hold is far cheaper than finding new water.

AWTT Floating Cover Solutions for Ranching

Modular, maintenance-free floating covers engineered specifically to address the liquid containment challenges of ranch operations.

Up to 98% Evaporation Reduction

AWTT modular covers float on the surface and cut the air-water exchange that drives evaporation. Rhombo Hexoshield® 66 is rated for up to 98% evaporation reduction and 99% surface coverage; Armor Ball® and Hexprotect® AQUA deliver the same mechanism at different price and wind ratings. The stored water stays in the tank, available to the herd.

Drop-In Deployment — No Earthwork, No Power

The covers are poured or placed directly onto the water surface. No liner modification, no pond drawdown, no anchoring hardware, no pumps, no electricity, and no moving parts to service. A ranch crew can cover a stock tank in an afternoon, and the system can be scooped out and redeployed to another tank if grazing patterns change.

Sunlight Blocked — Algae Starved Out

Cyanobacteria and filamentous algae need light. At up to 99% surface coverage the water below sits in effective darkness, removing the driver of blooms. The New Mexico stock-tank trial reported no algae or moss growth in the ball-covered tanks, alongside visibly cleaner drinking water for the cattle.

Wind Ratings Built for Open Country

Exposed rangeland tanks see wind that scatters lightweight covers. Armor Ball® AQUA 275 carries a factory-sealed 225 g water ballast for 75 MPH resistance, Rhombo Hexoshield® 66 is rated to 130 MPH water-ballasted, and Hexprotect® AQUA reaches 130+ MPH — all without perimeter anchoring or shoreline attachment.

Less Ice, Less Winter Labor

The same barrier that stops evaporation slows heat loss from the water surface. Rhombo Hexoshield® 66 provides R-4 and Hexprotect® AQUA R-2 insulation value, and the New Mexico trial documented significantly less ice formation on the covered tank. All products are rated from −70°F to +160°F (−57°C to +71°C).

Livestock Drink Straight Through the Cover

Cattle, horses, and sheep simply nose the modules aside to drink, and the cover closes back over the opening on its own. There is no gate, no float valve, and no training period. With a 25+ year expected service life and a 10-year warranty, the cover outlasts most of the infrastructure around it.

Quick Facts — Ranch Floating Cover Performance

Up to 98%
Evaporation Reduction
Rhombo Hexoshield® 66
Up to 99%
Surface Coverage
Hexprotect® AQUA
10 / sq ft
Ball Density
100 mm Armor Ball® (108/m²)
130 MPH
Wind Resistance
Rhombo 66, water-ballasted
25+ Years
Service Life
UV-stable HDPE
−70 to 160°F
Operating Range
−57°C to +71°C
25–30 gal
Herd Water Demand
Per mature cow/day above 90°F
10 Years
Product Warranty
All AWTT products

Recommended Products for Ranching

AWTT engineers recommend these floating cover systems for ranching applications.

Armor Ball hollow HDPE shade balls covering the full surface of a ranch water storage pond to reduce evaporation and block algae

100 mm | 10 per sq ft | 25+ year life

Armor Ball®

The lowest-cost entry point for sheltered stock tanks, storage tanks, and small ranch ponds. Hollow 100 mm HDPE spheres pour straight onto the water, self-level as the water level drops, and need no anchoring or maintenance. The right choice where wind exposure is moderate and budget per square foot matters most.

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Armor Ball AQUA 275 water-ballasted shade balls covering an exposed ranch water storage pond in open windy rangeland

75 MPH wind | 225 g water ballast

Armor Ball® AQUA 275

The rangeland standard for exposed sites. A factory-sealed 225 g clean-water ballast brings installed weight to 275 g and holds the cover in place through 75 MPH (120 km/h) wind, so a spring storm does not scatter your investment across the pasture. Same drop-in installation as the standard Armor Ball®.

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Hexprotect AQUA interlocking hexagonal floating cover tiles at 99 percent surface coverage on a livestock water storage tank

Up to 99% coverage | 130+ MPH wind

Hexprotect® AQUA

Interlocking 220 mm hexagonal tiles that pack to the highest surface coverage in the range — the strongest option when algae control and water quality, not just evaporation, are the priority. Available in NSF/ANSI 61 certified resin where the same source also supplies a household or dairy parlor.

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Rhombo Hexoshield 66 hybrid rhombus-hexagonal floating cover panels compared against adjacent open water surface on a storage pond

Up to 98% evaporation cut | R-4 | 25 lb/ft²

Rhombo Hexoshield® 66

The highest-performing cover AWTT builds for water conservation: a patented hybrid rhombus-hexagonal geometry rated to 98% evaporation reduction, 130 MPH water-ballasted wind resistance, R-4 insulation for winter ice control, and 25 lb/ft² buoyancy so crews can walk the surface during inspection.

Learn more →

Frequently Asked Questions — Ranching

Common questions from ranching operators and engineers evaluating AWTT floating cover systems.

Who manufactures VaporLok Rhombos?
VaporLok Rhombos are Rhombo Hexoshield® modular covers manufactured by Advanced Water Treatment Technologies (AWTT), a US manufacturer with 700+ installations across 25 countries since 2004. They are the same product under two names: AWTT designs and builds the cover at its North American plants, and VaporLok Technologies sells and deploys it on farm and ranch water across ten states. Rhombos are not the same thing as shade balls (Armor Ball® modular covers) — shade balls is the generic term for AWTT's 100 mm spherical cover, while the Rhombo Hexoshield® 66 is a patented hybrid rhombus-hexagonal panel with 130 MPH wind resistance, R-4 insulation, and a walkable 25 lb/ft² load rating. Both are AWTT products, both carry the same 10-year warranty, and AWTT engineering will tell you which one suits your tank.

How much water can a floating cover actually save on a ranch stock tank or pond?
Field data from a multi-year New Mexico stock-tank trial gives a concrete benchmark. A 7.5-foot-diameter tank with no cover lost more than 10,700 gallons of net evaporation over three years, while an identical tank covered with 4-inch water-filled balls lost about 2,600 gallons. On 20-foot tanks the gap widened to more than 81,000 gallons uncovered versus fewer than 20,000 gallons covered. Ranchers running the same approach in eastern New Mexico and the Texas Panhandle report evaporation reductions near 75%, and AWTT product ratings run from roughly 90% up to 98% depending on the system and coverage density achieved. To size the loss on your own site, run the AWTT evaporation calculator with your pond dimensions and local climate — it will give you a daily and annual gallon figure before you buy anything.

Can cattle and horses drink through the cover?
Yes, and this is the single most common question we get. The modules float freely rather than being fixed to the tank, so an animal simply pushes its muzzle through and the cover parts around it. When the animal lifts its head the modules drift back and close the opening within seconds to minutes. There is no training period, no gate, no mechanical waterer, and no risk of an animal becoming trapped. The same behavior lets wind and wave action redistribute the cover automatically as the water level rises and falls.

Should I buy through VaporLok or directly from AWTT?
It depends on the size of the water surface you are covering. VaporLok Technologies is AWTT's authorized farm and ranch partner for projects under 1,000 square feet of surface area — the majority of stock tanks, storage tanks, and small ranch ponds fall in this range. VaporLok holds ranch-scale inventory, understands livestock water operations, and can advise on cost-share programs. For projects of 1,000 square feet and larger, AWTT and VaporLok quote the job together and the cover ships factory direct from our North American plants — removing a handling step is what lets the price per square foot come down at volume. You still get engineered product selection, wind and load documentation for cost-share or permit paperwork, and VaporLok's support on the ground. If you are unsure which side of the line you fall on, contact either and we will route you correctly.

Which AWTT product is right for my tank or pond?
Start with wind exposure, then coverage priority. For a sheltered tank in a draw or near a windbreak, the standard Armor Ball® gives the lowest cost per square foot. For open rangeland where wind regularly scatters lightweight material, the Armor Ball® AQUA 275 adds a sealed 225 g water ballast for 75 MPH resistance. If water quality and algae control matter as much as evaporation — for example a tank that also serves domestic or dairy parlor use — Hexprotect® AQUA gives up to 99% surface coverage, 130+ MPH wind resistance, and an NSF/ANSI 61 certified resin option. If maximum water conservation is the goal, Rhombo Hexoshield® 66 is rated up to 98% evaporation reduction with R-4 insulation and 25 lb/ft² load capacity. AWTT engineering will make a specific recommendation from your surface dimensions, prevailing wind, and freeze exposure at no charge.

Will a cover prevent blue-green algae blooms in a stock pond?
Cyanobacteria are photosynthetic — cut the light and you remove the energy source that drives a bloom. At up to 99% surface coverage the water column below an AWTT cover receives effectively no direct sunlight, which is why the New Mexico stock-tank study reported no algae or moss growth in covered tanks. A cover is a preventive control, not a treatment: if you already have an active bloom, work with your veterinarian and state extension service to keep livestock off that water source before covering. A cover also does not remove the nutrient loading that feeds a bloom, so pair it with runoff and manure management where nutrient input is heavy.

What happens in winter — ice, snow, and freeze damage?
Modular floating covers reduce heat loss from the water surface and were documented to significantly reduce ice formation in the New Mexico trial. Rhombo Hexoshield® 66 carries an R-4 insulation value and Hexprotect® AQUA an R-2 value, and every AWTT product is rated for continuous service from −70°F to +160°F (−57°C to +71°C), so the HDPE itself does not become brittle or crack at rangeland winter temperatures. Because the modules float freely rather than spanning the tank rigidly, ice formation does not tear or stress the cover the way it can damage a fixed membrane. Where hard freeze is a routine problem, Rhombo Hexoshield® 66 is the recommended system.

Are there cost-share programs that help pay for stock tank covers?
In several regions, yes. Soil and Water Conservation Districts in New Mexico have run dedicated shade-ball cost-share programs — the Roosevelt SWCD covered 25% of ball cost under a water quality and conservation grant, and the Border SWCD offered 50% of project cost up to $2,000. USDA NRCS EQIP funds livestock water development practices at 75% of the estimated cost, or 90% for historically underserved producers, though eligibility for a specific practice code varies by state. Start with your local SWCD and NRCS field office. AWTT and VaporLok can supply the product specifications, wind and load data, and quotes those applications require.

How long do the covers last, and what maintenance do they need?
Expected service life is 25+ years, backed by a 10-year warranty. The covers are UV-stabilized HDPE with no moving parts, no coatings to reapply, no fabric to tear, and no anchoring hardware to inspect. Routine maintenance is limited to a visual check that coverage density is still high after a major storm and occasional removal of blown-in debris. Because the modules are loose rather than fixed, they can be netted out for tank cleaning and returned to service, or moved to a different tank entirely as your grazing plan changes.

Ready to Solve Your Ranch Water Storage Challenges?

Contact AWTT for a custom floating cover recommendation tailored to your ranching operation — including site assessment, specification sheets, and ROI analysis.

Contact Us Call 1-956-244-6523

Engineering Tools & Resources

Evaporation Rate Calculator

Estimate evaporation losses on your pond or reservoir and the ROI of a floating cover, using five FAO-56 / Harbeck methods with real-time weather.

Heat Loss & ROI Calculator

Model heat loss from a heated pond with the ASHRAE 5-component balance, then compare insulation savings and 20-year cost of ownership.

Not Sure Which Cover?

Answer a few questions about your site conditions and get a personalized product recommendation.

Technical Specifications

View full engineering specs, wind resistance data, R-values, and material compliance details.