Water change calculator
Enter your nitrate test result and your target. You'll get the size of water change that gets you there.
Test your tap water once. Many cities have 0 to 10 ppm.
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Enter your nitrate test result and your target. You'll get the size of water change that gets you there.
Test your tap water once. Many cities have 0 to 10 ppm.
A water change removes a slice of old water and replaces it with tap water. The percent you need is (current minus target) divided by (current minus tap). Splitting it into two smaller changes needs less total water swapped per change, which is gentler on fish.