OK so I have read up somewhat. Few questions I have.
How do I know how big diameter for my return line do I need? Im not going to devide the bottom tank right now. I mainly just want the extra tank for more volume and stability. Maybe putting some more LR
and plants in to help gas exchanges.
I have a maxi 1200, and a 900. I guess I just need to find out which one will pump the most water w/o pumping so much as the overflow can't keep up?
Where can I buy a overflow "tank"?
In essense the tank is always pushing water in from the lower tank into the top tank, and the top tank is always draing into the lower.
I still dont understand the parts to decrease flow and things to make sure the pump doesnt go backwards if something happened.