when u say easy atmmachine does that depend on the fish coz I plan to have some lion fish and some eels in a Saltwater tank
Peace Out Callum!
I haven't done it myself but my friend did, I think it's something with a type of cement and water. If you do a google search on it you'll probably find something on it. I know you can do it, just not the way and it's cheaper unless you can get cheap live rock. You can do it for base rock and get some real live rock since you can get live critters and corals with it, maybe agansoo or mike would know how to make it.