Could you get a pic of the tank as it is currently? Ensure to clearly display the hole
How wide is the tank? I would think that it would be at least 2ft wide?
How big is the diameter of the hole?
Also, correct me if I am wrong - but I get the impression you want to use a canister rather then a sump?
I can see what your LFS guy is getting at but I can't see it working too well if all the drainage PVC overlows are then directed to the one corner overflow and down the one drain - it is safe to assume the one standpipe would not be sufficient to cope with the load
With a picture we can suggest some ideas/options
It seems as though it is quite a large tank and IMO you would need more drainage holes or PVC overflows if drilling is not an option.
How wide is the tank? I would think that it would be at least 2ft wide?
How big is the diameter of the hole?
Also, correct me if I am wrong - but I get the impression you want to use a canister rather then a sump?
I can see what your LFS guy is getting at but I can't see it working too well if all the drainage PVC overlows are then directed to the one corner overflow and down the one drain - it is safe to assume the one standpipe would not be sufficient to cope with the load
With a picture we can suggest some ideas/options
It seems as though it is quite a large tank and IMO you would need more drainage holes or PVC overflows if drilling is not an option.