Fishlore I'm in need of some help. I keep a 55g tropical community tank. Temp is kept at 78F 7x Boesman Rainbow 6x Congo tetra 5x Kuhli Loach (more are on the way) 1x Clown Loach (im aware the tank is not appropriate, but he's here to stay for now and will be rehomed when he is to large. Im also aware that this is bad practice, but thats what i've got) There are no live plants Water parameters have been maintained and are pristine. I do 2 25% water changes weekly 0ppm ammonia 0ppm nitrites 10ppm nitrate (never goes above 20ppm) But i cant seem to get rid of these creeping diatoms. This brown algae is slowly infesting my tank. Its starting to cover my decor, my heater, my tank walls even. The tank only gets 6hrs of light a day and is not in front of a window or anything. people tell me it will go away on its own, but its been months. and its so ugly. I have a Sunsun 304b canister filter with a UV light. Should i try using the UV light to kill algae? I've never used it before. Any tips on riding my tank of these diatoms?