hi guys iv just started the process of cycling a new tank and iv put some old filter media in my 3 drawer trickle tower. Iv never tried cycling my tank this way before so i was just wondering what i should be seeing, its two days in now and iv put a small shoal of giant danios in so im getting low levels of ammonia and it kind of looks like i might be getting very low levels of nitrate (not quite orange on the api test kit but not yellow either) there is zero nitrite. so how quickly will a tank cycle using old filter media? its a 125g uk tank