Hi...I just finished cycling my 46 gallon FW tank. I got the ich several weeks in during the stress period and I had a completely successful result. I think the keys are to slowly bump up the heat to about 80 degrees if possible (speeds up the cycle of the ich organism and shortens treatment time) and take out the charcoal in your filter. I used malechite green (the brand was Wardley's). Despite being in the cycling period, I did frequent 10% water changes. Ich was cured in 7-8 days. Good luck. FR, MD