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I recently checked my water chemistry (chlorine, nitrite, ph and alkalinity) after doing 25% water change the day before and everything was perfect except for the nitrite. Before my nitrite was always around .5 ppm and now it showed 3 ppm. Is this in "safe zone" or should i do another water...

I just set up a 29 gallon saltwater aquarium last week and so far i have- one power filter with 200 gph flow, one powerhead, a heater and a fake coral formation with tons of hiding spots and a yellow tail damsel. To save on cash i decided not to buy live rock, do i need live rock even though i...