This isnt really a plant topic but I figured somebody might make use of it. I was told I didnt need a heater for my ten gallon at the LFS when I was setting it up. All my fish got ich and I was then told it was because I dont have a heater. Temp fluctuations throughout the day and night is most likely the reason. I ran out and got a heater and some rid-ich but I have already lost 6 of 10 fish. The plants are doing great though. Does anyone know if rid-ich will harm the plants?