Hey everyone ,
My tank had ich and I took all the fish out. Since then I noticed a red algae has grown on my rocks. Everything is running like it normally wood and I haven’t done a water change in about 2 weeks only difference. Any advice on what it is
Looks like cyano. Dealing with it right now myself. You can use chemi as suggested but since it’s empty you can do the dr Tim’s refresh waste way treatment.