Brown Spots on Rocks and Corals in Nano Cube

itsmeddd99

New Member
I really have no idea what is going on...all of the sudden I started getting a lot more green algae in my tank - and then these strange rusty red looking spots on rocks, mushrooms, sides of tank etc. I'd clean them off the tank every day then a couple of days later there they were again. My water tests always come out okay. It is cooler now - water stays around 72-74 verus the 78-80 it was in the summer...I only have 3 small fish - the largest is my nemo clown. Quite a few zoo's, zenias and mushrooms. ANY suggestions? itsmeddd99@yahoo.com
Thanks in advance for any help you can provide. I do have pictures if that would help.
 
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