I have a fully cycled 20g tank. Recently, my ammonia readings have shown 0.25 ppm
for the tank. However, the nitrites are at 0 ppm
and the nitrates are at 10 ppm
which is normal for my tank, so I have no idea what's going on. If the readings are true, I'd like to know because the shrimp in the tank are pretty sensitive to ammonia (RCS and Amano).
Attached is a pic of my water tests. Test tubes left to right: tank ammonia, tap ammonia, tank nitrate.