Perfect size slate for breeding Angelfish. The size makes it easy to artificially raise if your pair is known to eat their eggs and you have to pull the slate.
Also takes up less space in the aquarium then the recent Breeder Cones or Slate Towers I used to use for breeding. These Slates are all I use currently.
And you can't beat the price either. I recommend to all Angelfish Breeders. A++++