Water quality

Bottom-Up vs Surface Aeration

Fountains look great, but they mostly aerate the surface. Here’s why diffused bottom-up aeration does more for water quality.

KWKoenders Water Solutions Team· Aeration specialistsJan 20, 20265 min read

Fine bubbles rising through clear pond water

Not all aeration is equal. The difference between surface aeration and bottom-up diffused aeration comes down to how much of the water you actually oxygenate.

Surface aeration

Fountains and surface units churn the top of the pond. They add oxygen where the water is already best oxygenated, but do little for the deeper, oxygen-poor layers where muck accumulates.

Bottom-up aeration

A bottom diffuser releases fine bubbles that rise through the entire water column, circulating and oxygenating from the floor up. That reaches the bottom, where decomposition happens and where low oxygen causes the biggest problems.

For water quality and fish health, bottom-up aeration does more of the work that matters. Explore diffused aeration.

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Written by

Koenders Water Solutions Team

Aeration specialists

Aeration and water-quality know-how from the team that has been building pond aeration since 1988.

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