algae ID and control?

[GeoB]

Can anybody tell me what this flakey growth is and how I can get rid of it? Does anthing eat it? My sailfin tang, hermits and snails don't touch it. I've been battleing it for the past year or so by periodically picking it off the rock. While I was away last month my light timer malfunctioned a few times leaving the lights on overnight. The stuff really took off spreading to two other rocks. My pH, alk, and calc are all on the low side (working on that), nitrates are 0, and temp is 80-84.

[JimD]

Looks like brown waffer algae, usually common in newer systems and generally goes away on its own. If youve had it for a year, theres probably a source of nutrient overload there somewhere. Once you get your basic parameters in check (P04) the stuff should show signs of receding and go away, any problems with other macros? A refugium is always a good way to control many forms of algae.

[::pete::]

Heres a good link for identification.

[GeoB]

Thanks Jim and Pete! I did a web search using your info and found this on Wet Web Media along with a picture for positive ID:

"The "brown wafer algae" Lobophora is fast growing but not at all palatable to most herbivores. Some Diadema urchins will eat it, and if your tank is over 100 gallons, then a Naso tang may control it for you. Else, manual extraction is called for (Ughhh!... no fun)."

I checked my phosphates and they were 0, and I have Chaeto growning my my sump. I did move the tank a few months ago, though. Guess I have to keep picking at it.