I wish I could answer that with entire certainty.
I can tell you what I've got going on and what I'm sittint at.
The above pic of the pothos in my sump was from a couple days ago. The tank is a 90 with a 40b sump. Maybe 120-130gal system capacity.
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Got a big pile of africans in there. No idea how many.
The sump has a wetdry trickle tower and some sponge filters and junk in the sump. Mag9.5 pushing around 6-700 at head height. I do 50% water changes every sunday. Every once in a while I skip a week.
Its been 6 days since a water change.
Just tested the water a moment ago.
View attachment 1054694
~5ppm.
I don't test nitrates often. I cant tell you what the reduction is/was. The pothos doubled in size in the last couple months I'd say. It's rampant. I have it under 2x 6500k 10w cfls.
Hope that helps? Big plant, big bio load, low nitrates. I dunno, I'm just a dumb guy who likes fish.
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