I've had my 29g for a while now and all it houses is one male Betta. This tank has given me nothing but problems with hair algae and I'm about to give up. I have only 4 plants in the tank now but would adding more plants help? I don't dose with anything as I'm assuming due to all the algae that it has enough nutrients in the water. I use a 6700k light that's about 3wpg for 6 hrs a day. I've already thrown all plants away and started over with the 4 in there now and it's come back wirh a vengeance. Any ideas what else I .can try? I've tried peroxide, I've tried daily pwc, cutting lights back, everything. I don't have this problem wirh my 55 or 75g so not sure what the problem is.