Pawfly 4 Pack Aquarium Fish Tank Divider, Plastic Aquarium Grid Divider, Egg Crate Divider Tray Grid Fish Tank Bottom Isolation Separator for Aquarium Fish and Plants, White

I didn't get this for the original intended purpose, but rather used them for sci-fi terrain for Dungeons & Dragons to replicate floor grating. Looks great and worked well! The connectors click together really easily, and you can undo them easily without worrying about the plastic breaking or fatiguing over time. Nice product, and large enough for what I needed!

My betta is pretty big and swam right through it. Also it is difficult to work with and doesn’t fit so after struggling to cut it,and it doesn’t come with anything to attach it, it doesn’t even work .Boooooooooo

These divider racks are very lightweight and can be connected to each other in different configurations to fit your needs. When not in use, they can be detached and stacked to take up very little storage space. To re-attach them I recommend laying them flat on a table and pressing the pieces together to get them nice and flush.I have run into some issues with the connectors not always lining up, which I tried to show in the last photo with this review. Sometimes one connector will lock in and the next one won't line up correctly so there's no way to lock it in. When this happens, I turn pieces around and move them until they all fit together, which they do if you have just the right order and orientation but since all the pieces are virtually the same, it doesn't seem like this should be necessary. That said, these have worked well for me and have held up nicely so far. They can withstand a little weight and jostling around, if you're using them as floating shelving type dividers rather than upright as well.

I bought this to separate two male bettas in a 10 gallon tank. I ended up needing to cut several sections off, I think 3 squares off one piece, and then snapped that onto one of the other intact pieces. It *does* fit in the 10g with that size, however it is a tight squeeze and I ended up leaving it slightly bowed in the center because I was worried about possibly cracking my tank if I tried to force it to be evenly in the center.Using it like that in a 10 gallon tank would possibly work for temporarily separating medium sized fish, however my male bettas were able to swim through the squares with very little effort. I didn't think he would fit through at first, and my first boy stayed on his side during the first day he was in the tank. I was doing a test run to see if by the morning he would end up on the other side- he did not. I started acclimating my other boy to the other side, and within 5 seconds of starting to float the plastic cup I had boy 2 in, my first one swam through the squares of the divider and started trying to attack him through the plastic.I ended up taking some plastic mesh that was part of a kit for making a custom tank lid, and I wrapped it around the divider. I zip tied the mesh across the divider and secured it in over a dozen spots until I was sure it would stay in place. I have sand in the tank and the divider is buried in the center of it to help hold it in place. It has been several months and so far my boys have been safely kept apart. It doesn't look the best, and they can still see each other so they do flare at each other at times, but for the most part they do their own things.Having male bettas within sight of each other is not the best- however this was the result of unexpectedly obtaining these two as nearly lifeless boys that a local chain store was ready to flush (alive!) I was able to resuscitate and bring them back to health, meaning I am now the proud owner of these spicy little guys. This divider can work with modification- I hope this helps other betta owners!

Very easy to use fish tank divider. Make sure you pre rinse them. Mine were a bit dusty. Had a weird smell from wherever they were stored too. But they are easy to build ramps for turtles or divide your tank with.

This did not work as a tank separator. Flimsy not able to secure. My fish was able to get thru. Went right in the trash.

I like the versatility of these dividers. You can stack them side by side and rotate and add another, This allows you to block off parts of your tank in a variety of ways.The only reason I only gave 4 stars is that the holes in the plastic mesh are about 1cm wide. I usually divide my tank to raise fry, so I will have to wrap mesh around this divider to make it work in my tank. Also, that is sort of a big mesh for most sorts of fish - so it's more of a framework than an actual divider.

By far the better way to divide a fish tank. Large opening for high water flow, but very low chance of clogging. But the openings are small enough to stop most adult fish from crossing. Pieces snap together easily, and securely, with the integrated notches. And custom sizes are easily achievable by snipping away the unused part. Especially useful if you have large design elements in your tank, like rocks and branches, where you want to place the screen. Or simply double up, slide to fit, and secure with a couple of zip ties. Easily anchors using sand or gravel at the bottom. Doubles as a screen on top of the tank as well. Plastic construction makes it totally inert and will not disturb the water's Ph balance. Still can have algea growing on it, but the large opening and high water flow makes it harder for them to anchor and start growing.