I absolutely love aquarium coop stuff! My only regret is after the 100's of dollars of stuff I have bought, I would have waited and gotten the free tshirt. Keep it up guys!

Bought 2 of these for my penguin 175’s great product. I never liked the sponges that marine land made for these. Love how they are sideways and the coarse sponges are great. They fit perfectly and what a great upgrade for the filters!

Works well. Much more water intake than with regular set up.

Works perfectly

I bought this to modify my Penguin Pro 275 because of how often the "official" fine pre-filter sponge from Marineland kept clogging. The adapter fits perfectly onto the stock intake tube and pairs great with the Aquarium Co-Op's Large pre-filter sponge as recommended. The overall print quality is also superb and weightier then I was expecting plus the adapter came nicely packaged in a clear plastic sleeve with an informational card. If I were to nitpick anything about the adapter, I would say the only thing that seems like it could use some work is the left over 'hairs' of fine plastic within the strainer area from the 3d printing process. But again, it's only a nitpick as once you install a pre-filter sponge you'll basically never see it again. All in all, I give the adapter 5 stars and would highly recommend anyone looking to hot rod their Marineland Pro filter!