Today I had a little problem with algae in my tank. There has been a bit of a recuring BGA on my gravel lately. Also, I had a problem wiht my CO2 taday and it was off all day so I left the light off. Its my 10 gallon, 3 wpg diy CO2(see post in DIY section) and all the necessary ferts, finally. I was unable to test my water tonight due to time restraints but as of sunday all were withing normally accepted levels. Today, I got home from work, turned on the light to check the tank an work on the CO2 setup and the gravel had three times the BGA and even what appears to be some green hair or maybe thread algae all over the gravel. I just dosed Saturday with a 50% wc and was goig to check nutrient levels, add as necessary and dose 1 ml of Flourish. I assume the sudden sturt in algae growth to be the correct amount of nutrients in the tank but lack of photosynthesis from the plant due to the lack of light. There of course, was still ambient light from the room although no direct sunlight. I there anything I should do or will a couple good days of plant growth slow down the algae. SHould I do a wc as soon as I can or base my wc on my fert levels. I generally do a wc i fmy nitrates hit 10ppm. I just got the flourish and my first phosphate test so this part is pretty new to me. Should I just bite the bullet and do a 3 day black out? I am sure that is what Tom Barr would say. Any suggestions?