P.S. Of less importance, but I thought I should note it anyways: The plastic tracks that come with this divider are aqua blue and really don't do anything for the look of your aquarium unless you already happened to have an aqua blue color scheme going on. If you're looking for something that will blend in with your tank decor, this won't. It would have looked so much better if the tracks were black or white... it would also have helped if the mesh itself was opaque black instead of clear but I digress...
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the divider works well.. though i replaced the see through plastic with some plastic canvas from an arts and craft store, two layers prevents the bettas i have from seeing each other and getting aggravated. i also used some aquarium safe silicone glue because i couldnt be bothered with the clips that came with it... but works well holding it all together. and if you have fish that dont get aggravated the plastic that comes with it looks to work fine and fit wellRead Best Reviews of Penn-Plax® Tank Dividers® for Aquariums Here
I used this in a 15 gallon tank for moderate tempered bettas and zebra danios (nippy to each other, but mostly would chase). It does a great job of keeping the fish separated, but I found that over the top filtration wasn't quite strong enough to pull waste from the far side of the tank with the tiny, tiny holes. Solution: drill larger holes at the top and bottom, sand the new holes only (those areas will cloud a bit) and rinse. Viola! It works!Everybody is happy and safe in the tank now!
I wish they didn't use that god awful blue for the edges, and that the clips didn't get in the way of the hood, but at least my little guys & girls are comfortable.I got this for my pair of whiskered pleco's , wored great, only drawback is that I had to lower the water level about an inch, I wish it were about 2 inches taller. Other then that, I have used it several times, and I have a lot of babies to show for having it. Other fish in aqua will eat the eggs, and this helped .

