About two months ago maybe less, I bought a 75 gallon and didn’t know any better so got talked into using API quick start. I used api quick start 24 hours after I dechlorinated the water in my tank and added 7 little fish to aquarium (1 per 10 gallons as I was told) wasn’t long before ammonia started showing up so I’ve kept it under 1 ppm for the whole two months and yesterday it was around 0.85 ppm so was planning on doing water change today. Tested water today just curious before and ammonia was at 0.15 ppm, does this mean my cycle is coming to an end and also should I still do a water change today as I had planned?? Greatly Appreciate any tips!!