I had ordered the large sponge and found it was a little too big for my HOB. Having watched ACo-op do all kind of cutting gave me the confidence to fix that issue. I went ahead and ordered the medium for the future and found the size difference was much greater than I thought it would be, especially since I know there is a small size. The Medium is a lot smaller than the Large, which leads me to believe the Small is tiny.
The sponge itself is great, well designed and well made. I just hope the Medium will not be too small for my HOB when the time comes.
It fits perfectly. So glad that I could add this to my 10 gallon tank. None of my local stores had it.
Excellent service and communication!
Title says it all, I tested it for a while, my main concern was that maybe baby cherry shrimp could get trapped in it but they are perfectly fine. I like that it is covered on the bottom part as well.