I have been using NP bio pellets for over a year now. The pellets started tumbling back in december 2009. My phosphates were always zero and my nitrates prior to using the pellets hovered around 8.
Two weeks after running the pellets my nitrates dropped to 4. I had not changed anything else.
Two more weeks past and my nitrates dropped to zero.
Prior to using Bio Pellets I had a refugium with chaeto but I took that off line when I started using bio pellets. I started out with pellets in a two little fishes 150, then upgraded to a vertex UF-15,
then to the UF-20, and then in December of 2010 I added a second UF-20 and daisy chained them together.
Ya, I am running a lot of pellets, LOL, but I do love them as they have worked out well for me (I think)...
Recent coral photos:
Tank specs and notes:
* 150g + 131g plumbed together (single sump), SPS dominant with clams and LPS, heavy(ish) bio load.
* I did take my GFO offline when I started using biopellets but I noticed my phosphates rising slightly so I put them back on line and continue to use GFO with the bio pellets.
* Bubble magus 220CS Skimmer
* GFO and Carbon
* Additives: Just Baking Soda (for alk), Calcium. No other additives.
* Weekly 10% water change.