You could use 2 of a necessary size to cover they are pretty flat to nest together. They aren't good enough for shrimp or newborn fry but otherwise I think would keep most fish out.
This is why you hide fish food when you are having company. That and put a big sign on the tank that says " Look with your eyes, not with your hands."Not my tank, but we are at a friend's house for a birthday party and they have a tiny 20 litre tank with 1 zebra danio in it. One of the kids at the party decided the danio was hungry and dumped half a botte of fish food in there.
So my job at the party is to retrieve the fish and try and clean up the aquarium.
Not my tank, but we are at a friend's house for a birthday party and they have a tiny 20 litre tank with 1 zebra danio in it. One of the kids at the party decided the danio was hungry and dumped half a botte of fish food in there.
So my job at the party is to retrieve the fish and try and clean up the aquarium.