As always everything I buy from aquarium co-op works great!
I have 7 different aquariums with various species of fish. I cut poly filters into small pieces and left it overnight to check for water quality. It worked great and found out I had some harmful organics in my planted aquariums. Great product.
I find it very interesting to see what the Poly Filter is sucking out of my water! It was helpful in my quarantine tank to make sure the water was ok. My main tank has a lot of tannins, so it is not as helpful there, but it is good to know I have it as a backup option. As far as service is concerned, I was very pleasantly surprised by how quickly my order arrived! This was my 1st order & it was all dry goods, but I will definitely continue to order in the future! I feel completely confident that any type of live order would be safely shipped.
No complaints here. Very versatile tool to have.