Hey all, I've had a 29 gallon tank set up since July and have been letting everything cycle and all seemed well. Then came the cyano. Just a little bit here and there until I decided I wanted to do something about it, so I purchased some chemiclean and used it. It worked great, all the cyano got knocked out but a day or two after I checked on the tank to see what looked like an explosion of brown substance. Is this another form of cyano? Brown algae? Or just a normal cycling process? I did recently upgrade my lighting to a dual 39w t5. I will upload a picture when I get home