Hi, thank you for sharing your knowledge with me. I have a 75g so what ends up happening is that my water evaporates about 1/8 of a tank and every week I add water only. If my parameters are a little off I change the water 25% or even 50%. I have a fluval fx6 because when I first got into hobby I bought a turtle, damn they produce a lot of waste.
I rinse all my filtration with the water from my canister. I never use tap water to rinse any filtration.
What worried me was the cichlid was not too old about 6 months.
Currently what I have is 12 cichlids, 2 catfish, 2 plecos, 2 cory catfish and one silver dollar.