I'm back with my still high ammonia readings.I have 2 ten gal,1 55 gal,readings on my oldest 10 gal as of last night: ammonia 4.0,nitrites 1.5,nitrates .25Tank is 4 weeks old,can't understand why still the high ammonia.The other 10 gal readings are: 4.0 ppm ammonia,.25 nitrites...only a trace of...