Hi, I have wanted to upgrade my 170L tank to a custom made 320L tank that is 700mm hi by 900 in length. My first question is how would I work out how much power I would need if I was to make an led light fixture in 3 watt LEDs. I know it's different from conventional lighting as you don't work it on watts per gallon. The second question is what size pipe should I use for the return and overflow? The pump I'm using is a 3500L with an 30mm outlet
Thanks
Thanks