Tim,
most folks use a reactor of sorts that will allow goo flow enough to cause the pellets to tumble gently. I have a BRS Dual chamber carbon/GFO reactor that I am using for mine. I use about 1000ml worth of the pellets which is about what my tank is "supposed to need" per research. my pellets gently tumble. BRS also makes a true pellet reactor with larger fittings that allows more flow. the one I have just gives enough flow at wide open. I am about 4 weeks into the pellets. 2 weeks ago, I noticed a bit of cloudy in my water. I could tell it was a bacteria bloom. it cleared in a day or two and my water looks clearer than ever before. I have always tested zero nitrates since I used that nitrate coil, but it will be going offline this weekend.
I also had an issue wth Hair algae caused by poor water going into my tank. I didnt have the RO hooked up yet. I am running GFO in a reactor now along with the pellets. I tested last night and PH4 was at .03ppm. the HA is now receeding very quickly and can actualy be blown off hte rock with a turkey baster. it is no longer the bright green but a very dull color.
I know as a combo that the pellets have kicked in and the gfo is working. once I get it where the phosphates are no longer in the system, I will remove the gfo and let my pellets do the job.