I just started filling it up today maybe 2 inches. Pond armour and fiberglass on all seamsWhat have you used to seal it? Is it fibreglass? Epoxy paint? Is the ply bowing?
23/32 inch plywood reinforced with 2x4. Pond armor and fiberglass on seams. 84long 36 wide 24 inch tall.Would be helpful to know how you built this tank...materials used, overall dimensions, thickness and grade of plywood. Need some details and we can get you straightened out. I tend to over build when it comes to plywood tanks, but sure better than a leak!
Did you perform a leak test, fill then wait and check for leak repeat all the way up to the top, or did you fill the entire aquarium?