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Then add to your aquarium in small increments, test the Ph after adding a small amount of the premixed Ph Down.
Reducing the alkalinity should be done over a period of several hours.
Reduce the Ph of your aquarium water slowly as fish do not not like sudden Ph changes.
As the Resin removes organics/tannins this will stain the resin.
To remove the stain recharging in non scented bleach is required.
Recharging in bleach will reduce the amount of recharges possible.
Approx. 1 out of 4 recharges for freshwater will require bleach recharge, check for discolouration.