want to build a ats for my 125 tank do it above tank useing the return pump to power it and my 400watt metal haide
what i need to know is
how big going vertical being light from one side ?
how close/far from light should i be?
how to fig flow?
i'm going spit the return so extra flow go to tank
pump is about 700 gph at the tank.
any help will be greatly appreciated
just want build this right