Hello everyone, I'm getting ready to get my tank set up. I have a 29g with a built in overflow, my question is...do i need to put glue on my pvc that goes into my gasket where it drains, or could i leave it as it is and shove it into the gasket? Im afraid that it will come loose and water will spill all over the place. If i should glue it, what do you recommend? Thanks for your help, its my first saltwater tank and overflow.