[AquaticLife] tank cleaning?
There are a lot of variables in there to consider when determining how much water should be changed. When I was keeping and raising _Julidochromis transcriptus_ they would get no more than a 5% water change because any change in water parameters was tough on that fish. If you have a tank at or over its limits for fish, a 50% change would not be out of line. Same if you have “dirty” fish like goldfish or Oscars in a tank or several smaller changes during the course of a week. Fry tanks need many water changes during a week to allow for maximum growth and cleanliness.
A 10% change is a good number to aim at since it does not radically change water parameters, and in a proper tank without too many fish (my tanks may seem to be sparsely populated compared to others I have seen) it is sufficient to remove enough nitrates, hormones and other DOCs to maintain good water quality.
\Steve//
Category: Philippines Internet Koi Society
