ok so im going to add some PVC pipe to my quarentine and wont to know how to clean it. also it has blue wrighting on it, is that ok? also i have an aquatech 5-15 that when i was moving my 5 gallon i removed the filter and never turned it off and when i put it on the tank it was like if you pushed the intake down you couldnt hear the impeller but when it was higher you could hear it but the filter wouldnt work so how do i fiix this?