Hi I was wondering , my 135 gal has been running for 3 years, And I have 2 HOB emperor 400, xP2,Xp3,Xp4 floor canisters... Recentley my tank started getting cloudy so I did a 30% water change as usual which I do once a week.. Then after the water change about 20 min later it started getting really cloudy and wouldn't go away ,its been 3 days now since the water change and seems to be getting worse, anyone know? :confused: