I have been into aquariums for years but recently my 36g Bowfront tank has been a nightmare to get cleared up very cloudy. It was nice and clear for a long time but recently I can't get it straight. It will just about get clear after filter media changes but then the filter media gets green and slimey. I have used a little bit of clear water stuff and algae control but with no success. I was using 2 HOB filters 1 Fluval 50 and Penguin 150 older version. But decided to try a new Top Fin Pro 50 HOB and hasn't got any better maybe worse. I have to change carbon and rinse other media weekly or it overflows around the tube. I have 3 Bala Sharks one is big 5", 4 Tiger Barbs 1-2", 2 Gouramis 2", and 1 big Pleco 6-7". I know that's probably pushing it on being crowded but waste isn't really the issue I don't think. Water here does suck but I have always cycled my tanks and I never use tap water to clean up the media or filters without treating it first same when I do water changes I am sure to treat and use a all in with live bacteria. I use a master test kit regularly and don't have any bad levels of anything ph is also pretty good. I thought maybe I was leaving the light on too much so I cut back but it hasn't helped. My tanks clarity can change in a couple hours which I have never really experienced. Any help or advice would be great! Gonna go broke buying stuff for filter and chemicals! Also I love my fishes I want them to be happy and they are not! Thanks again!