Hi, I have 420 litre tank that has not long been set up and will still be cycling(if it’s started). It’s had water in for about 2 weeks. I have been adding fish food but am very confused as the api test is showing 0.25ppm ammonia I think it’s hard to tell between that and 0. (It’s not quite light yellow or as green as 0.25ppm) Nitrites and nitrates are as you may expect 0. Why is the ammonia not rising? Also there is a very strong smell kind of like ammonia and stagnant water although the filter has been running at all times. Lastly even though I washed the sand thoroughly and the water was running very clear the next day the tank was cloudy and has been cloudy for 6 days. Any advice would be great and if you have any questions please ask. Thanks, Laura.