I have had my one inch p's in this tank for four days. I noticed last night that the water smells a little like fish. I was wondering if I could just do two gallon water change every day. Also, what about the temp of the new water I will be putting into the tank. I also am going to vacuum the gravel, as I suspect there are some old worms lying around which would cause the % fish" smell. What I am concerned most with is the temp of the new water. I have three p's in there and two rosies with almost no tails.Thank you much for the input. This site is great!