https://scontent-lga3-1.xx.fbcdn.net/hphotos-xpf1/v/t1.0-0/p180x540/12717355_10153512744098212_8866936287140956335_n.jpg?oh=2b695c3e2acd0c54fd62d9a7a3aa7ea4&oe=572B9027
what are the blocks made of? I want some for my plecos... not zebras lol bushynose.
I think they are made of ceramic. Angel Fins sells them.
http://angelfins.ca/index.php?main_page=index&cPath=28284&zenid=e57450501f953c5106ba606e6deecb71