Do you think I need to drill for the return line or lines? i was thinking of 2 drain lines. One in each upper back corner. Is there an advantage to having a drilled return? This is all new to me. I think four holes might be pushing my luck. Could i have 2 drains and one return hole?
Or am I better off with one drain and one return line?
So If I want to run around 500 gph
...with 2 drain holes. You say a one inch hole is going to get 600 gph
. Would I want smaller than one inch holes than? Wouldnt 2 one inch holes get 1200 gph
Same as the overflow box capacitites. Two 300gph versus one 600gph??