Hey I recently got a fluval 305 canister filter used. It was used on a saltwater tank so it has a bunch of little crustaceans or whatever you want to call them inside the filter. I tried to scrape off as many as I could. They are just like little small white dots everywhere. See the pic. I have washed all the media thoroughly and it cleaned up pretty well. But I was wondering if I could still use it on the freshwater tank or the little speck things would hurt the fish. Thanks
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