help! I had been away for a little while and now my 55 gal is loaded with long green algae and red/purple cyano? It's all over the rock and the back of the tank as well as some on the sand. I did a water change, tried to syphoned up some of the cyano from the sand, and tried scrubbing the rock with a toothbrush but it still coming back. Does anyone have suggestions to get rid of it?
Thanks
Thanks