I switched about 5 months ago, I stopped vodka dosing right away and then after 2 months stopped using GFO and about 2 month from that pulled out my cheato, I had phosphates reading using a Hanna instrument of .02 or .03 before the change and I am now at the same levels. The pellets are easier to maintain and the cost is less. I also had no algie bloom when I made the change. Just make sure your pellets are in some small reactor where you see them tumble. Good luck