adding your baqua-chemicals! Allow
levels to drop down very close to 0. You
may want to run filter longer, and add
an algaecide (not
baqua-cide) when levels begin to get low.
This process may take several weeks. Keep the pool as clean as possible by brushing, skimming and vacuuming.
Clean the filter. Biguanides can clog
up filters, and leave chemical residue which
may react with chlorine.
If you have a Sand Filter, it is recommended
that you change
the sand in the tank. If this is
not done, you must at least use a sand filter
cleaning product made by your biguanide
manufacturer (Baquacil, Soft Swim, etc.)
The same applies to Cartridge Filters. You
the cartridge, or at least clean
it and then soak the cartridge in a similar cleaning
product, and rinse thoroughly. If you
have a D.E. filter, backwash it and open
the filter tank; following printed instructions
on tank. Remove filter, hose off thoroughly,
then soak it in the cleaning
product mentioned above. Hose again [very] thoroughly
pool water chemistry. Then shock the pool
shock, Also called potassium peroxymonosulfate.
Add it at a rate of 8 lbs. per 10,000 gallons
of pool water. So, if your pool is 22,000
gallons, you'll need 17 or 18 lbs. Add 1/2 the
shock, wait 24 - 48 hrs and then add the
remaining. Add the shock according
to directions on package, with the filter
pump running. Pool may turn cloudy for a
few days if biguanide levels are not zero.
Re-check and balance water
chemistry. Run filter 24 hours a day, 7 days
a week until water clears, backwashing as
Finally, we begin to add chlorine,
very slowly. Place one tablet in skimmer
basket, floater or chlorinator.
If your pool doesn't react to it (by turning
funny colors) keep it in until it dissolves.
Then add 2 tablets, and so on, until you
are able to get chlorine readings of 1.0
ppm with your test
kit. Maintain this level with tablets.
Refrain from using chlorine shock products
for one season, substituting non-chlorine
shock, as needed.
good time to switch may be in the spring, after a winter of not adding
any baquacil or soft swim. I have heard reports of others who have
said that they simply let their pool go very green, made sure the
baquacil levels were zero and then shocked it with chlorine. A simpler
approach to be sure, however changing the filter media is still required.