Dany
Fish Addict
BUHH??? water hardness is from disolved Salts inside the water.... maybe boiling these will evaporate them, salts as in the oxidized metals and calciums found in your pipes and in the supply of water from your area...
ie the calcium that makes up limestone on which your local water supply may be based,
ie the calcium that makes up limestone on which your local water supply may be based,