I’m going to do a small project and was curious about using either a bulkhead or uniseal. I’m going to drill the bottom of some 2.5g tanks and was wondering if a 1/2” Uniseal would work. I’ve heard that 2 gallons may not be enough water pressure to create a good seal. Also, as I pushed the 1/2” pvc through the seal, I noticed it would flex a bit. I’m worried that this might crack the tank. Would a bulkhead be safer?