Diy slate caves

[PoopSmart]

I use silicone glue on the same exact rocks to hold plastic plants down (I thought it was cichlid proof) and my oscar ripped every strand of plant off the base, but the glue stayed in-tact on the rock holding the base down.


It worked for me.

 

[FireMedic]

Might want to consider rounding the edes of the slate to prevent injuries to the likely inhabitants. I usually use a very coarse bastard file.