if i remember corectly yeaterday it was at 50 water change done and added tetra nitrate remover todays test showed it at 30 will do another water change tomorrow so to my reconing should be sorted in 3 days or less i hope Cycle was done useing old media from my other tank wich was fishless cycled for 8 week water around here is real hard and high ph i currently got ph down to 8.0 from 8.5 im useing water life 7.2 buffer at a slow rate but waiting until after this mini cycle i had a fish die stuck under a rock thi caused the spike i beleive he was there for about 2 days water temp is at 26 i have a 12 inch air stone and 3 filters in there one at 600gph one at 300 gph and the other is a small unknown one tank is 166 litre