Solutions · Algae Control
Algae & Cyanobacteria Control with Ball Covers
How it works
Algae and cyanobacteria need sunlight to photosynthesize. A dense 91% Armor Ball® layer shades the water surface, starving blooms of the light they need — a chemical-free way to limit algae and the UV-driven reactions, such as bromate formation, that can affect water quality.
Because the control is physical rather than chemical, there is nothing to dose, monitor, or replenish. The opaque UV-stabilized HDPE simply blocks light at the surface, and the layer self-adjusts to changing levels with no maintenance.
What to look for
- Coverage completeness: Light control depends on a full 91% layer; size your basin with the coverage calculator so blooms can't find open, sunlit gaps.
- Water-quality context: Shading limits light-driven growth; combine it with your existing treatment plan for the best result.
- Potable documentation: For drinking-water sources, request material certs, SDS, and NSF/ANSI 61 documentation where applicable.
Related reading
FAQ
Algae Control — questions answered
Do ball covers stop algae without chemicals?
Yes. By shading 91% of the water surface, Armor Ball® limits the sunlight algae and cyanobacteria need to grow, suppressing blooms without dosing chemicals.
Does blocking light also reduce disinfection byproducts?
Shading the surface limits the UV-driven reactions that can form byproducts such as bromate in chlorinated, bromide-bearing water. See our guide on bromate and UV disinfection byproducts for the chemistry.
Will algae grow on top of the balls?
By removing the open, sunlit water that blooms depend on, the cover suppresses the algae growth that matters for water quality below the surface, where light is now blocked.
Get a custom Armor Ball® quote
Tell us about your site — surface area, liquid, and goals — and we'll size a cover and respond within 24 hours.
Manufactured by AWTT · 700+ installations · 25 countries · 10-year warranty