Hello, I have a 55g, one year old tank running on a cascade 700 +aquaclear 50 filter. Gravel substrate, plants include anubias and java fern. 2 swords, 9 ember tetras, 7 ruby tetras, 1 clown pleco and 1 rubbernose pleco. I have had a mild algae bloom for months. I have tried treating with a clearing agent (Nutrafin Clear Fast) and filter floss on my intake, and it clears for a day or less, and then back to cloudy. I have a nicrew classic blue and white led light. I have now tried adding ferts using NilocGThriveC - just added them once a few days ago. I am truly at a loss and starting to feel discouraged. I had a major bloom when I was first setting up the tank and got rid of it with a blackout for a week, but this one is not as severe, but just chronic. I have no visible algae growing on my glass or plants. I have been doing 20 percent or so water change weekly. Any advice?