LR Placement

[tmoney]

I have had my 30 Gallon fish-only tank for lets see...4-5 months now and it's still got the red algae on the sand and the rocks. Anyway, I read that you should not place the LR on top of the LS, rather to the glass bottom of your tank.
I still have my LR ontop of the LS and have never had it on the glass bottom of my tank. Should I change this? I read you might kill your fish when you lift the rocks to move them because (dead?) bacteria might kill them, is this true?
Any help will be greatly appreciated!

 

[thomas712]

If you uncover an anerobic area of a sandbed then yes you can cause a major problem. It is this anerobic bacteria that can cause the problem.
Personally when I setup my tank I only used about a 2 inch sandbed, but I also put eggcrate under the sand on the bottom of the tank so that the rocks would never touch the glass bottom. I cut the egg crate about 2 inches from the sides of the tank and just put in place and then covered with sand. I have less problem with a shallow sandbed in the main. I use a 4.5-5 DSB in the refugium.
Thomas