The Angelfish Fish Breeding Slates come with a suction cup that is placed on the tank bottom to help keep the slate from being knocked over. It is 11.5" x 2.75" . This is an all-natural quarried slate that has been proven to be very effective and desirable to several types of breeding cichlids, not just breeding angelfish pairs. They are very convenient when hatching the eggs artificially.
The Angelfish Breeding Slate was produced with people like you in mind. Something to keep you happy.