Back again -
1. yes i left the tank for about 5 weeks before adding any fish - was just adding stress zyme but no food or ammonia etc... Have had the biorb for about 10 mnths now.
2. Test kit is an API freshwater master test kit - liquids.
3. pH 8.2, Ammonia 0, Nitrite 0, Nitrate 40ppm.
3...