Chlorine Demand

[gfritz1]

Really spoke more about draining the lines etc etc then it did about chemicals .Normally when closing a chlorine pool with winterizing kit you have the shock-the stain preventer-some type of floater that has something in it and a algae preventer . With BBB chemically what do you do ?Also normally I have been adding when on chlorine tabs a algicide weekly like back up . My understanding with BBB I do not need to do this ? Presently all I have been adding is the bleach each day and keeping my FC above 5 due to my cya. Normally each day it drops back to 3.4-4.4 and then I add between .5 and .75 gals. Water has been excellent and it has been bonus days in Pa as water is 86 .Closing is withing next 3 -4 weeks so getting ready thus reason for questions. My winter cover is mesh

[aylad]

I don't close my pool, but I think the general consensus is to shock the pool, add a dose of Polyquat, and wait a day, then bring the chlorine levels back up...and then cover the pool. The earlier you open in the spring, the less chance there will be for a mess on opening--I think most folks try to open as soon as they can while the water is still cold.