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  1. Fertilizers and Water Parameters
    Hanna Instruments recently started selling a $50 colorimeter for measuring nitrates in saltwater aquariums: Hanna Instruments Link Does anyone know a reason why this wouldn't work for testing our freshwater aquariums? I understand this is a bit overkill, but I have always been interested in...
  2. Fertilizers and Water Parameters
    Hello everybody, I'm looking at the Hanna Iron Test kits. I see there are a few options. Which one will get the job done? For instance, I see : https://tinyurl.com/sffzb4j and I see https://tinyurl.com/yx54hb8x I don't need anything fancy, but I would like to use something like this...
  3. Fertilizers and Water Parameters
    I'm getting back into the hobby after a lot of years, and am wondering what the best stuff is for testing these days. I know I'm going to want to test for specific stuff. nitrate phosphate calcium alkalinity I have a pH meter and a refractometer already. I'm thinking I'm not gonna bother...
  4. 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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