I want to now how I could keep my tank from crashing to much. How I should build the Refungium and set up and If I need a calcium reactor and all those equipment everybody have in those nice tanks. Make me a diagram of your best result filtration system. Thanks for your help.

Herbert:shout:

Technically your 75g doesn't qualify as BIG tank, unless you have a 105g sump underneath it...

You should probably consider posting this in Reef Discussion, and maybe attacking one topic at a time, just to keep it from going in so many directions at one time, if that makes sense.