The right water change. Ok a lot saying 50% water change and some say 25% water change. Some say once a month water change some say 14 days water change. So i have put this to the test with my 3 tanks. 125 .55. 77 gallon tank. My 125 high over stock and good filters fluval fx6 fluval aqua clear 110 plus powerhead filter. I did first 50% water change i use api stress enzym and stress coat. 1 hour later i test the water nitrite 20 ppm
nitrate 10 ppm
from a stabele condition. 1 week later i did the same thing but now 20% water change. Before water change i did a test. 0 amonia 0 nitrite 0 nitrate ph 8.2. It had no effect on the test result.what tells me that a 50% water change every week is to much and from now on i do once in the 14 days a water change. Also it has to do with how much you feed your fish. But i always had a problem with a 50% water change what do you guys think.
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