I have recently set up my 130 litre tank following a power outage last year which wiped out my tank. It has been running now around 2 weeks and i have been doing daily water tests to see where things are. When tested at my LFS i show high ammonia at 1.3. However i have tested NH3 and NH4 seperatley and my Nh3 reading is almost zero but my NH4 is 0.6 which is high, but i thought NH4 was non harmful. Can someone give me a little guidance here please.