Can't Get Rid Of Ammonia In New Tank

[geordieelvis]

I have recently set up a 2nd tank, and can't seem to lose the last of the Ammonia. It is a 320 litre tank , I had a prawn in a mesh bag for 2 days , removed it and my ammonia was reading about 8ppm, I then introduced some media from my existing tank and after 48hours, ammonia read 4ppm and Nitrites 0ppm. Another 2 days later ammonia was 2ppm Nitrites still 0ppm. Now for the last 3 days my ammonia is settled at 1ppm and isn't changing. I have added more media but still getting ammonia reading. Nitrites are 0ppm, tank is 26degrees, ph of 7.4

 

[Liv15]

I have a problem with ammonia after I do a water and I tested the tap water - turns out the ammonia is coming from our tap water