Third day in fish less cycling. Added ammonia yesterday as water was testing at 2.0 ppm. Tested again last night and it was upto 4.0 ppm. Test for ammonia today is again 4.0ppm. I have not added anything this time, was hoping to get advice on here? Do I leave it and let the filter do its work or do I do something else? Btw nitrites are 0ppm for second day running.