Fish Farming & Aquarium Calculators
Free tools for fish farmers and aquarium keepers. No sign-up, works on your phone, light enough for slow connections.
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Toxic Ammonia (NH₃) Calculator
How dangerous is the ammonia in your pond or tank at its pH and temperature, and what to do about it.
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Tank & Pond Volume + Salt Dose
Gallons or liters of your tank or pond, and how much aquarium salt to add.
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Daily Feed & FCR Calculator
How much feed per day for catfish, tilapia, pangasius or gourami, and your feed conversion ratio.
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Stocking Density
How many fingerlings for a round or rectangular tank, biofloc system or earthen pond.
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Fish Farm Profit Analysis
Production cost per kg, profit per cycle, break-even, R/C ratio, payback and risk scenarios.
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Pond Logbook
Record daily feed, mortality, sampling and water quality. Survival, FCR and feed advice update automatically.
About IkanSehat
IkanSehat ("healthy fish") is a fish health project from Indonesia, built with input from aquaculture practitioners. Our main product is a free fish disease checker app for farmers (currently in Bahasa Indonesia). These calculators are free tools we built along the way. Every formula and reference value is shown on its page so you can check it.