PerceptivePesce Posted April 5 Share Posted April 5 How long does it take for a nitrogen deficiency to manifest? I'm dosing my tank with expel-P which also requires lights-out for 24 hours. I've done 2 treatments 8 days apart and my 3rd treatment is scheduled in 2 days. I've also lost 2/3 of my nitrogen producing guppies, and I've done 2 extra WCs (before treatment WCs were performed once a week, I've done 2 WCs per week since treatment.) My java ferns were fine before the treatment, but now they are dying. The leaves are quickly rotting away. Link to comment Share on other sites More sharing options...
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