I had this blue green algea so bad I almost gave up on the tank. I was ready to just sell the whole tank I was so mad at it.
I was so fed up with it I took everything out of the tank. I had sand substrate I removed it all added a plant substrate. Re planted the tank but there were still bits of BG algea left in the tank. I raised the light up 4" From the water surface.
Cleaning the filter was and is key to getting rid of this stuff. It thrives in a dirty tank that has low o2 with high light.
I now keep the filter clean and my water flow is nice and strong. Allowing for good flow around the tank. I also have more surface agitation and added more plants. Since doing this I have never seen a spot of BGA. Or any other algea yet I added rams horn snails to the tank and they keep it spot less.
How often do you clean your filter?
80gal planted Angelfish community.
100gal SA cichlid, Silver dollar, and delhezi. No plants!
36 gal Planted Swordtail community.