works well
if directions are followed and water is changed regularly this product works very well. keeps all my glass much cleaner than if i hadn't used this product. The only problem I have and the reason I gave 4 stars is that if the water is not changed in about 2 days there is a funny taste and smell from the product. I imagine this is from what its filtering but still being forced to change my water every day or every other day becomes a hassle
Rating: 4 stars