If you have 0 nitrates and phosphates , No real reason to go the whole hog .
I was using the pellets , Mine did a good job on nitrates @ around 5 and under , Using the Red Sea pro test kits , But not much for phosphates :(
So i started using Zeo , Nitrates now always 0 still using red sea pro , phosphate is 0 to .04 ( Hanna )