Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Easy to use, may extend life of intake/output tubes

I have used this on both fluval 404 and a 204 lines. It is easy to use, and you will be amazed at the gunk you flush out. I run the brush through, then run some water through the filter in my sink.Once I detached the hoses, but that was such a pain, I didn't do that again.I'd highly recommend this if you have fluval filters. AND, I'm sure it will work on other canister filter tubing as well.I can't really tell if water flow is better after cleaning out the tubing, but I'm sure it is improved as well, and that can only be good for both the tank and the canister filter.