Wanna know the netting? Imagine those hair nets at Fast Food places or Bakery, that’s basically what you’re getting thrown over plastic. I guess its great if you wanna put fish in a “timeout” or separate male guppies.As a hatchery? Ehhh…. No go research German hatchery, way better designed just very expensive. The holes will not store eggs or recently hatched fry.Also I used this on a 20 Gallon long, and felt it was still too big. Just felt bulky and unnecessary to me.