I am setting up a new freshwater with Flourite black sand and this stuff is a nightmare to clean. I rinsed it very good, but it still clouds the heck out of the water. I have 50 micron in my canister now, but have always had best luck polishing water with a HOB mag canister. I don't have one now and was wondering if someone would let me borrow one for a few weeks? It wouldn't be used on anything live yet.
