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  1. Fertilizers and Water Parameters
    I bought the Salifert Profi O2 test kit (says it's for freshwater and saltwater) and I carefully followed the instructions for freshwater. I want to get a general idea of my tank's oxygen levels in the morning (before CO2 on) and then again in the afternoon (right around when the CO2 turns...
  2. Equipment
    Hi all, nOOb to this site. Appreciate the wealth of info here. I use Hanna Colorimeters for testing on my saltwater tank. Does anyone have experience using the Hanna instruments on freshwater. I am thinking about the following: Ammonia Low Range HI700 $50 Nitrite Low Range HI707 $60...
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