Currently in my 15 Gallon Aquarium i only have a chocolate chip starfish in it, with 2in of crushed coral with 1in of live sand on top of it. The filter is a penguin 190 biowheel. The PH was kinda low at around 7.8 and the nitrites where 0 and the nitrates ranging from 40-80. Then after i raised the PH to 8.3 there was a sudden nitrite spike, and its almost up to 30, i been doing water changes and it lowers it slightly, but i dont know what would cause such a dramatic increase in nitrites. The aquarium has been running for a little over 2 months.
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