---
url: https://www.eurocovers.eu/vs/aerators
title: Floating cover vs. aerator for algae control — comparison
description: Floating covers suppress algae by blocking light; aerators raise dissolved oxygen to disrupt bloom conditions. Comparison on cost, power, and effectiveness.
updated: 2026-05-25
---

# Floating cover vs. aerator for algae control — comparison

> Floating covers eliminate algae photosynthesis by blocking light (no power, no chemicals, 25-year lifecycle); aerators raise dissolved oxygen to inhibit bloom conditions but require continuous power and do not address evaporation or odor.

For pure algae suppression at lowest operating cost, floating covers outperform mechanical
aerators by 1.5–2× and require zero power. Aerators are the right choice when raising dissolved
oxygen is the primary objective.

## Where each fits

**Aerators** raise dissolved oxygen, support aerobic biological treatment, and disrupt thermal
stratification. They consume continuous power and slightly increase evaporative losses through
agitation.

**Floating covers** block light (eliminating algae photosynthesis), reduce evaporation by up to 95%
(AWTT), and cap odor and VOC release. No power required.

## When aerators are appropriate

- Fish farms or aquaculture with DO targets
- Biological wastewater treatment where DO drives process performance
- Where evaporation is not a cost concern
- Where continuous power is available at low marginal cost

## When covers are appropriate

- Pure algae suppression
- Evaporation reduction valued
- Odor reduction required
- No continuous power available or wanted
- 25-year operating horizon

## Combined deployments

Modular covers + aerators work well together: cover the bulk surface, leave exclusion zones
around aeration units. Common in wastewater treatment storage ponds.