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    Is a Greensand with Calcite filter fish safe?

    Great, thanks, that kinda fits with what I was thinking. I'll ask them if there is some kind of sensor that releases calcite or not.
  2. B

    Is a Greensand with Calcite filter fish safe?

    We live on well water, pH is 6.0 or below, dkh and dGH are at about 3 each. It has some other metals but are all "OK" for humans. I have a betta in an 8gallon planted tank, no supplements. Our water treatment system needs to be replaced to remove ferric iron and raise the pH. The system is...
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