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Originally Posted by wiste A 50% water change is more affective than 5 - 10% water changes at reducing excess nutrients.
If you are overdosing ferts to prevent any nutrient deficiency, then you do not want to minimize the affect of the water change.
Changing 50% seems O.K. if you have a small aquarium. However, dumping several hundred gallons of water a week just does not seem ecologically friendly. |
Well, you have two choices: PPS without water changes and testing for NO3 and PO4 every two weeks or so
or
PPS with 50% water changes and no testing
