Sponge Tank Divider - 20 Gallon Tall
I used this for a corner Mattenfilter build. It had the dimensions I needed without any cutting in a 40 breeder
I actually received more than I bargained for, but that really doesn't affect my review what so ever. It's something that's so simple but yet to find a good source that's reputable. Literally took it out of the box and dropped it in the middle of my tank. Shrimps are thriving and love to hang out on both sides of it. Thanks again!