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- May 6, 2020
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I still think that you might have an air leak on the recirculation pump. An easy test for an air leak, and possible solution would be to take most of the pump cover off and put the pump in a container of aquarium water, and make it so the SD output goes into the container(this is what I'm doing). You may want to start over at one drop a minute(about 3.33 ml). If this makes the nitrite go away, then you found the cause of the nitrite.Forgive me here, trying to understand this further. Are you saying that while my nitrate levels are high maybe nutrients available to the corals are low and still available as a food source that carbon dosing won't utilize? I have over-simplified the heck out of this but just trying to make more sense here.
Could it be that the media wasn't bad and that by taking it out and putting it back together had a better air tight seal? Not questioning just trying to find out the reason sulfur wouldn't work?