The 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 all-natural quarried slate that has been proven to be very effective and desirable to several types of breeding cichlids. They are very convenient when hatching the eggs artificially.
The Breeding Cone is 9" high and suitable for many cichlids. If you want something that won't tip over easily, this is it. These will fit inverted onto a wide-mouth glass jar with the base sitting on the top of the jar. Many like the fact that they can artificially hatch in a one-gallon jar using this cone. If you prefer to let your pairs raise their own fry, then these are the best option out there.