Hey guys, I just recently bought a used fx5. Now before filtrating my tank, I tried my best to wash it clean. When I thought it was and turned it on in my tank......a cloud of brown particles (probably the previous tanks fish waste) covered my entire tank... I freaking panic and did a water test but the ph, nitrate, ammonia, and alk was not too bad, but should I be worried? plus when I do a water change and turn off my fx5, is it going to do the same crap when i turn it back on? What should I do before turning it on after a wc? should i run it in the tub for a bit? Please any advice from fx5 owners will be EXTREMELY HELPFUL! PLEASE AND THANKS IN ADVANCE!