Amazing By Jake A on 11/30/2010
Jake A would recommend this product to a friend
I had my doubts but I have been using these for 6 weeks now and I am absolutely amazed. I tested nitrate each week and for the first month the nitrate slowly creeped up. Boom week 5 they were almost undetectable with my salifert kit. This is so easy to use I wish someone had come out with these years ago .