The tank is a juwel korall 60litres with a bio flow mini filter and a fluval u2 filter, the nitrites are 0 the nitrate is 10 and amonia is 0 the tank has been cycled for about a month temperature is 25 celcius. It doesn't get any direct sunlight and the light in the hood is juwel twin light p5. I also have an air stone in one corner, the stock is 6 harlequin, 4 dalmation Molly, 4 black phantom tetra, 3 dwarf blue neon rainbow, 2 bristle nose catfish. All the stock are infant at the moment and I am hoping to increase my tank size soon. I have only had the tank 2 months and I am completely new to the hobby. I used the calculator on the internet and now realise I am about 50% over stocked- sorry