Pleco Condo best suited for most extra large bristlenose plecos. Made with all aquarium safe materials that do not affect water parameters. Due to the variation in the natural stone I work with, the condo you receive may have a different stone pattern The caves measure approximately 2.25" wide by 2" tall by 6" deep, with a backing to create a dark spawning cave. Most hypancistrus plecos prefer a cramped cave that is slightly wider than the males pectoral fins, so please make sure these caves are an appropriate size for your fish before purchase. For hypancistrus and other bristlenose plecos, I also have spawning caves for them available on my store!