well, i duno, i wouldnt have thought it cost that much. people use it for their black ghost knives so they feel secure and they can see them. if you tried to breed them, then its easier to check on eggs and general spawning. you will see them still (depending on pleco, some like to hide regardless) but plecos like dark areas to make their site. males usually have one little bit they like to call home, whereas females are more nomadic. i think if/when i do it, im just going to have lots of little caves. you can always put loads next to each other. usually they can remember which one is theirs, the same way as bats all have their own little bit on a cave wall. however, it would be cool to have a network, especially if you can see an outline of where they are (light enough plastic so you know where they are, and dark enough to suit the pleco). lol its like hamster rotastack for plecos