Diatoms

rtk wrote:
I've developed a nasty case of brownies. I think it's just a coincidence
that I opened a new bag of salt, same company. No new anything in the
tank. I tried an inch of fine sand on top of the old, but that didn't
stop anything. I change 6 gallons of water per week from the 55 gallon
tank. Here's a pic with a few details:
http://www.personal.psu.edu/faculty/...l****erID.html

I'd appreciate any suggestions. It is seriously ugly.

rtk

What are your water parameters including Nitrates?

Do you have a refugium setup?

What about your lighting? How many hours a day?

--Kurt