My tank is a 5.5 gallon with new amazonia soil, growing HC, diy co2 with two bottles, dose 1ml of excel everyday and .5 ml of flourish every other day. I also have a 24w 6500k pc light on for 10 hours a day. Anyway I believe I keep having issues with hair algae (there are long green thin strings coming off of my HC and some growing on the plants). I got rid of it then it came back so I am guessing it is from the DIY co2 because my PH has ranged from 6.0 to 6.4. ANYWAY my question is what should I dose to increase my PH and keep it stable and also do you think the PH is even the issue? I want to get some shrimp but don't want to put them in an unstable environment.