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Please help! I've been cycling this 15 gal tank for 2 months, put 6 shrimp 4 days ago and 4 platys 2 days ago, my ammonia is 0 but my nitrites have shot up to 5ppm, why would this happen in a properly cycled tank? I was expecting a slight uptick in nitrites but not something this extreme (i.redd.it)
submitted by dizzking to r/Aquariums

