RobustAire™ Diffused Aeration RA7

Diffuser count is driven by surface acreage, but placement is driven by shape. A round one-acre pond behaves very differently from a long, narrow or multi-lobed one of the same size.

Systems run from a single diffuser up to twelve on the RA12. Send us your acreage, maximum depth and a rough outline and we will lay out the placement before you order.

Scale and construction. Home Series uses single-loop diffusers with a 1/4 HP basemount compressor and a 2-year warranty on all items - built for backyard ponds with one or two diffusers.

RobustAire uses dual-loop diffusers in a noise-reducing AireGuard cabinet, scales from one to twelve diffusers with up to four compressors, and carries 3 years on the compressor, 15 on the tubing, and lifetime coverage on the diffusers and cabinet.

Depth decides it. A surface aerator or fountain works the top few feet and covers a wide area. Diffused aeration releases air at the bottom and lifts the entire column, which is what deep or stratified water actually needs.

Under about eight feet, a surface aerator is usually enough. Deeper than that, diffusion is the right tool, and on larger water the two are often run together.

Yes, and on many ponds it is the reason to buy one. Because the cabinet sits on the bank and only tubing enters the water, there is no motor in the pond to pull out before freeze-up.

Run through winter and the rising bubbles keep an opening in the ice, letting trapped gases escape and reducing the risk of winterkill. Diffuser placement should be adjusted for winter operation - ask us before the first freeze.

Quieter than most people expect, but not silent - it is a piston compressor running continuously. RobustAire cabinets use AireGuard noise-reducing construction specifically for this reason.

On a residential shoreline, siting matters as much as the cabinet. We can advise on placement relative to the house and the property line.