Hi there, I am currently attempting my first ever tank cycle, fishless of course. I started by putting some flakes in the tank but decided to go with an ammonia solution instead to speed things up (famous last words lol). So basically I did my calculations of what I believed would give me around 5 or 6ppm, per the advice I’d seen online, but I added less than my calculations told me cos I was aware of the food waste already in the tank. However, when I checked the ammonia levels after adding it, the water in the test tube eventually turned a dark murky grey colour, almost black. Which isn’t even a colour in the test kit chart. Do I need to do a water change to bring it down a bit or else the cycle won’t progress? At the minute there is a fine gravel in the tank, decorations and plants.