Thanks, I see clear Salifert from the effluent, so I know it's possible. I'm still stumped on the 150 creating 5.0ppm of NO3/ day. Not as efficient as the sulphur reactor, but I have a 4" sand bed, and two marine pure 8x8x4 blocks in the bottom of the refugium, almost no light reaches the top but I have a rio 600 moving enough water to keep detritus off the bottom, so I would think there is some additional NO3 removal by the:
Sand bed
Live rock
Marine pure blocks
In addition to the 5ppm/ day the sulphur reactor removes.
Seems like crazy production, I'm not a chemist but, I would assume getting close to the actual weight of the food added to the tank each day, especially when you consider the crud removed from the sock also changed each day
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