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Discussion Starter · #1 ·
I have a Fluval 204 filter and today I shut it down and pulled it out for routine cleaning. When I hooked it up and fired it up a bunch out white stuff shot out of the return flow. It looked like some kind of funk. It filled the tank and looked like a snow storm had hit. I've never had this happen before. Can someone tell me what it is and if I should be concerned about it? Thanks in advance for any help!
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