Originally posted by woodymdt
Ok, I got home this evening, and this brown stuff is spreading. It's now almost completely covering this top rock, it's on some of my heater, and on top of one of my powerheads......
Arkey?? Still think it's diatoms??
Yep that's what it looks like to me. Here's part of the
New Hobbiest thread by Beth.
Diatoms: Usually appears as a brown dusting or film on the glass, LR, or substrate. The brown dust that is seen is actually not the algae but dead diatom skeletons linked together. Many times this is the first algae to develop in an aquarium and is often seen within the first four months of setup.
Diatoms need silicates to grow and only last as long as there is a supply in the water. One of the most common ways silicates are introduced to the tank is through the use of tap water. Untreated tap water may contain silicates as well as other unwanted additives to the aquarium. Other means of silicate introduction can be the use of play sand that contains silicates or the curing of LR.
Silicates: This is the compound required by diatoms for growth. If there are no silicates in the water there will be no diatoms.
Common sources of silicates include tap water, play sand that contains silicates, and the curing of LR.
As long as your not using Tap Water, it should go away on it's own.