8 Pack Fish Tank Divider, Snap Together & Cutting Feature - Plastic Aquarium Divider Panel Separator -Grid Isolation Board Divider, Egg Crate Fish Tank Bottom Tray, Black

I only received a 4 pack, but the seller was quick to respond and refunded 1/2 what I paid to make up for it. They only snap together in one direction such that you have to alternate which way the face. This isn’t obvious, so I can see how some people might try to force them together and break them. Look closely at the slight taper in the connections to see which way to insert them. These are sized just right for standard 20 gallon long, 29 gallon and 55 gallon aquariums which are all about 12inches wide inside. Two are just right for a 20g long, three are just right for a 29 gallon and three will work for a 55 gallon, but about 2 inches short of reaching the top, which you can make work with thick layer of gravel. You will have to cut them to fit any other size aquarium. The holes are smaller than some other similar dividers, which is why I chose these. Hopefully these dividers will allow me to have 2 pairs of clowns in one 55 gallon tank. We'll see.

Good product for the money

I did not receive suction cups but I had my own to it did what I was looking for.

I wanted this as the bottom of an above tank basking platform with a 17"x10" 4 sided cube above it for my turtle. It could be the way I have it snapped together but it bends in the middle and I have the cube straddling the joints. I'm really not happy at how it turned out. But it could be my fault. I ordered 2'x2' squares from another company to reinforce what I have now.

Missing suction cups. Can’t use with out them but working on improvising so we will see

Would be okay, but they are almost impossible to cut to size. Any smaller kinds of fish can fit through the holes easily as well.

Does not work for fish at all. Nearly killed my fish by them getting stuck in the over sized holes. Also no suction cups were included

Does not fit in a 55 gallon tank the fish can swing around it