My biopellets have been in the system for over a month now and most of the cyno is gone and my nitrates were getting lower. A day or two ago I noticed some cyno in the main display. I just got home from work and was checking the tank and sump as I do every morning and I noticed that my pellets looked like they were absorbing water. They have plumped up a bit. I'm new to bio pellets and I'm wondering if this is a bad thing. I am about to do some water tests to see where I'm at. Any help would be great!!!!