Green water has plagued my 20 gallon. I was wondering if there was a solution that didn't involve a blackout or uv sterilizer. At the moment I'm changing 25% percent of the water every day. This is keeping it at bay but I miss only needing to change water weekly. Could an increase in co2 or a hydrogen peroxide regimen help at all? I welcome any links to articles on the subject seeing as I can't find too much info on pertaining to my situation.