Hello all. You all seem like a wise and helpful bunch. I have a 29 gal. freshwater tank that's been up and running for about 4 months with 5 tiger barbs and a bala shark. About 4 weeks ago, my water began to get cloudy. Right away I cleaned the substrate, changed the filter and did a partial water change. (I started feeding them frozen bloodworms occasionally, and overfed the first couple times. There was a lot of junk at the bottom) After being gone for the holidays for a week the water was even cloudier when I returned. I've asked my local pet store about what to do. I tried an algae killer, thinking it was a floral bloom, and changed the water every 4 days (it was really cloudy at that point), and reduced the amount the lamp was on to about 5 hours/day. Didn't work. I also tried a biological enzyme thinking it was a bacterial bloom, but it just made the water cloudier. I still clean the substrate and do a partial water change weekly and feed them carefully, but the murkiness persists. It really doesn't look greenish or whitish unless I add the enzyme which makes the water milky for days untill I change it. Any ideas?