In my 75 gal i have lots of LR but when i get the new larger tank, i am not gonna want the LR anymore since the LR takes away from the niceness of the aquarium since it makes the aqurium look ugly. Then in the new tank i am just going to put alot of dead stony coral in there with the LS of course, but instead of the LR i am going to need another type of rock that is a good substitute for the LR. Just some type of dead or fake rock that is cheap, and wont get as ugly as the LR but that i can build ontop of and make holes and caves and then place the stony corals ontop of that. If any could tell me a good rock to use as a substitute, that would be great, thanks