I have a question i want to run pvc pipe through the bottom of my tank from my tank to my pump over to my chiller and back into the tank. I have a reef ready tank which is pre drilled if i remove the line under the tank which goes into the sump will that have constant water running or does it stop at a certain point. I dont want to remove that line and 110g of water is everywhere. Im scared to check i think once the sump is filled up there should not be anymore water flowing through that line. Anyone.