You might want to look at running two pumps...I tried to run pellets and carbon with a single MJ1200 and I wasn't happy. Now I run a MJ1200 on my pellet reactor, and a MJ600 on my carbon reactor and I'm happy. I've also noticed that if you're not careful, and push the rubber 90 elbows on the TLF reactors all the way down you end up cutting off more flow to the reactor, as the hose barb on the reactor almost butts up to the top of the elbow.
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