Yess, zero readings 3 days straight. Should be buying fish this weekend. I would like to get 2 clown fish and an anemone. Would this be ok. I have a deltec mce300 skimmer, 300w fluval heater, live rock, fluval 305 filter, 2 tunze blowers, sand substrate, and lighting is 2 blue 2 sunlight 24w...