Can anyone explain to me in simple terms what Diatoms are. I tried to
google it, but the site are all checical this or chemcal that. Its beyond
what I know.
Thanks
"rtk" wrote in message
...
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/...wSal****er/Sal
****erID.html
I'd appreciate any suggestions. It is seriously ugly.

rtk