Recently, I have done a lot of research on Betta Sororities and I am thinking of starting one. (I'm just worried about the high failure rate) But i have just one more question before making my final decision.
I am going to have 9 Bettas in a 15 gallon tank and I am wondering how often I should change the water since the tank will have such a heavy fish load? Its not cycled yet, but I think I probably will.
So what does the community think how much water should be changed weekly for a cycled and non-cycled tank?
Thanks for any comments.