Hi guys so I got this roughly 540 I think 72 x 36 x 48 and it has 4 holes in the bottom drilled and I was going to just bulkhead and plug them but the acrylic top is unmolested and lids fully seal so would like to use the already drilled holes
2 holes are 2 3/8" and the other two are 1 3/4" I beleive
I have 2 ocean clear high flow canisters and a large external pump already but was considering running 2 big canisters in closed loops but don't know if they will take the 48" of vertical water pressure on the seals?
Any input is helpful, pic is hard to see the holes but they are visible in the 4 corners roughly a foot in from each side

2 holes are 2 3/8" and the other two are 1 3/4" I beleive
I have 2 ocean clear high flow canisters and a large external pump already but was considering running 2 big canisters in closed loops but don't know if they will take the 48" of vertical water pressure on the seals?
Any input is helpful, pic is hard to see the holes but they are visible in the 4 corners roughly a foot in from each side
