Start / Livestock and aquaculture / Fish farming
See the flow needed to exchange the pond water at the rate you want, and how long the full exchange takes.
Pre-sizing and estimating tool: the results do not replace a design, calculation, or report signed by a qualified professional, nor verification against the applicable standards.
Flow required for 0.5 to 4 air changes per day in the same volume; the highlighted bar is your target.
Flow in m³/h by number of air changes; the dot is your target.
Drag the controls to simulate data different from what you entered (from 30% less to 30% more) and watch the result change instantly.
Flow, in m³/h, for 0.5 to 4 renewals per day, for different pond volumes.
The calculation done in steps, with the values you entered.
The calculation memo gathers this page's inputs, results, equations, assumptions, and references, with fields for project, responsible person, and review. The full report also includes the charts and interpretations, in color. In the print window, choose Save as PDF.
Enter the volume of water in the pond or tank and the number of exchanges desired per day. The calculator shows the required flow, in m³/h and L/s, and how long a full exchange takes.
Pond of 2,000 m³ with 2 water exchanges per day.
Flow = 2,000 × 2 ÷ 24 = 166.7 m³/h, or 46.3 L/s. Full exchange = 2,000 ÷ 166.7 = 12 hours. Water per day = 4,000 m³.
Depends on the species, density and system. In intensive systems, the exchange rate is higher. Use the manual's recommendation and monitor ammonia and oxygen.
Not necessarily. High exchange wastes pumping energy and can bring contamination in with the incoming water. The ideal is just enough to keep water quality.
Because water exchange only cleans water that mixes. In large ponds, there may be still zones with little oxygen.
No. In ponds with large losses, add water replacement to the calculated flow.
Important notice: the Agrocalcs tools make estimates and preliminary sizing based on the data entered and on published engineering methods. They do not replace a design, a calculation report or a report signed by a qualified professional (CREA/ART), nor verification against the applicable technical standards and legislation, such as the Regulatory Standards of the Ministry of Labor. Material and fuel properties vary: check with the manufacturer or with analyses of your process before deciding. By using the site, you agree to the Terms of Use.
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