Those caves are very cool. They remind me a bit of cammo army bunkers.
"fall back soldiers!!!"
Here is my attempt at a DIY cave. Made it with cement and a bucket of sand... It took a long time to be ready to go in the tank though. There was actually a 4" clown knife hiding in there when the pic was taken.
and i thought i said this here but i guess i didnt.
the lil white caves fell apart after a couple months.
not sure why but they did.
the big river rock one is still going strong tho
i plan to make a second one sometime.
the new one will be a bit taller tho.
"all my fish are to big for the one already made"