The sad truth is that yes it will eventually cause more harm than good. They need to be cleaned almost weekly in order to perform efficiently. Crud is always building up and accumulating inside of it.
You'd be much better off to use your skimmer, and live rock for filtration, using your canister filter ONLY for carbon use. I wouldn't use it after a couple days of running carbon only. And simply use powerheads for circulation.
JMO.. has been working quite well for me so far
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20g BB Mixed Reef // Coralife 150w HQI // AquaC Nano // Koralia 1 & Seio 820 // Jager 200w // AC50
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