First appearance of Algae

[ranand]

Janet

Would the shock amount add that much more CYA? Would that be about 12 oz for 3lbs of shock or less than 10 ppm. You are right 12% bleach is the better. From a transportation issue I thought the bulk was difficult and personally the 12% I could only buy in wholesale amounts. But to the OP liquid chlorine is the best.

[aylad]

Janet

Would the shock amount add that much more CYA? Would that be about 12 oz for 3lbs of shock or less than 10 ppm. .

Ranand,

If this poster were using the dichlor to maintain a shock level of 20 ppm for a few days, as would be required to kill off an algae bloom, his/her CYA would skyrocket. Dichlor gives 9 ppm of CYA for every 10 ppm of chlorine delivered. Dichlor would be a bad idea for this poster's issue.