I have used egg crate under my rock without any problems for years but I am about to set up my 180 and am interested what the alternative is. I have a pistol shrimp and convict blenny, these two guys can completely undermine a large rock in one night.
The alternative is not using it. Simply arrange the rock on the glass, add sand around it and nothing can dig underneath.
01-02-2014, 11:42 AM
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