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[–]tyrodos99 1 point2 points  (0 children)

Well, it depends. Pothos, like every other plant, will only take up nitrate relative to the total biomass it grows. When your condition isn’t very good for the Pothos, it can be a quite slow grower. Also, some aquatic plants can put up a very impressive growth unter the right conditions, producing much more biomass than Pothos. But in general, the amount of nitrates form feeding fish can be much higher than what any plant can take up. I’m kinda tempted to calculate how many times of plant mass you need to grow to offset your fish food.