Hello, I am a newbie starting a 90gallon saltwater FOWLR
tank. My tank has a built in overflow in the rear left corner. I am using a 20 gallon sump. The questions I have are with the plumbing I should use. Is PVC
or tubing better? I was leaning towards tubing since I am new at this and figure I'll make some mistakes that I'll want to correct.
I also have a large bulkhead (not sure where they are measured), but a 1" male adapter fits in the threads. This bulkhead is in the drilled in the bottom of my tank. Should I slip a coupling into the bottom of the bulkhead and then use tubing or should I buy larger tubing and put it over the threads? The pipe leading into my overflow is only 1".
I also purchased a ball valve for the return pipe, but how and where should I place this if I use tubing?
Another question that I feel stupid for asking, but does the gasket for the bulkheads go inside the tank or on the outside between the tank and the nut?