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Hey, it's me again, Marconis: Bad luck filter kid.

My XP3 tubes were really long on my canister and it caused a bend in the inlet tube. It was causing air to enter the canister. How did I know? Well, when I'd turn it on, the impeller would sound like it was cracking through air, or grinding through it until it could spin fully. Once that happened, air would spout out of the spray bar. The canister would be quiet upon turning on, but then an hour or two later, bubbling noises/ slight grinding can be heard. So, I cut the tubes shorter thinking that was the problem. It wasn't the problem though, as the same thing happens. Where else can air be entering my canister? It is only a few months old. What are the negatives of air entering the canister?

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Possibly the bend increased resistance to the water flow. Then the impeller could have been starting to cavitate and produce air bubbles in the canister. Over time that would built up to a lot of air in the canister. Any place where water is able to hit a solid, it will wear it out eventually. If that would be a problem in a canister I'm not sure.
 
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