ok. not something I'll be doing then. I like a little of the green stuff growing the tank.The 50/50 peroxide ( 1/2 tank water and 1/2 3% peroxide ) is a good way to permanently kill GHA when you can’t fully remove it manually. Safe for Zoa’s as long as it’s kept to about a 5 minute dip. They usually will remain closed for a few days. They are opening already.
gives my herbie's all day feeding opportunities.