The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
I don't recall exactly how much gravel it took to make my cave, but I simply took out a few cups worth (to match the tank) and let it dry out for the project.
are you serious about the kids? i tried this too, not really thinking it'd be too hard, and the gluing the rocks on was just terrible. i can't imagine kids doing it, and the fumes are toxic too
Be careful using ABS. I have been told be a couple different sources, my local hardware store and Home Depot said that ABS could leech chemicals into the water. How true it is, I do't know but might not be worth the risk.
How big was the pipe that you used for yours? The largest PVC 3 way I could find was 2" so that is what I will try for my C. Trilineatus.