Bio-Pellets and Carbon?

[Lampshade]

The big reason NOT to run GFO with pellets is because pellets feed bacteria carbon that takes about 1 part phosphate and 16 parts nitrate and get's it out your skimmer somehow. So if you run GFO you may be reducing the overall effectiveness of your pellets by reducing the amount of phosphates available. At the same time, lots of people do run GFO without problems because not everyone is going to have exactly 1 part phosphate for 16 parts nitrates. Mine where nice and balanced for a long time, and unreadable, but now i have cyno while running pellets, so i'm assuming my phosphates have crept up a bit, so i'm debating adding GFO to the mix.

If you're not running carbon i'd add that in there before GFO, carbon helps out in lots of ways, especially bio-warfare reduction.

You don't want to daisy your pellets and carbon since you want carbon with a low flow and pellets with lots. I had mine set up that way since i figured extra flow wouldn't hurt, but then my carbon got old and clumpy, and my pellets turned into a solid pile of toxic mulm. If you can split them off the same pump that's one way, but a cheap mj400 or something will probably be enough for your carbon.