chlorine levels

[aylad]

When you originally make a post, it goes into a queue for one of us mods or Ben to look at, and won't show up on the forum until we approve it. Sometimes it takes an hour or two, but between the 5 of us, somebody is usually on the forum most all day. I deleted your other duplicate post.

IN a 20K pool, each 2 1/2 quarts of 6% bleach will raise your FC by roughly 2 ppm. Most of us use the regular, generic Ultra bleach from WalMart.

You can do a partial drain and refill with fresh water in order to lower your CYA. Just don't drain too much at one time so that you don't float your pool.

Janet

[fhorta]

Ok. Got it.

Went ahead and purchased walmart clorox. Threw 4 gallons of it last night. This morning the pool floor looked better than it has looked in a long time. Seems like it worked. Also back washed and added de before throwing clorox in. Been vaccuming all day. Will throw in other 2 or 4 gallons of clorox and run pump all night again.

Tried shot glass cl measurement and according to readings my cl was 20 ppm last night before throwing in clorox. Also tested water this morning and was told my cl was high, which I knew and also ph. Said cya was fine at 30?

Weird. Seems I had the adequate cl and cya to get rid of this stuff but I guess water preferred clorox rather than granular chlorine I was using..? Hopefully I can get rid of this stuff completely within next couple days with clorox. Also went ahead and got some liq chlorine from les lies. Wl be using this stuff until algae is totally gone. I will also plan on changing sand filter. You think this may be necessary? Thanks for the great advice everyone.

[aylad]

If you mean changing oit the sand in your existing filter, it's probably not necessary, unless you've recently converted from bacquacil. Glad you're making progess with the bleach-- sounds like you just had to get that cl high enough to get over the "hump"!!

Janet

[fhorta]

ok. i was just thinking since traces of algae may be left in sand i would change sand out.

well, since last post pool floor still looks good.

the only thing is that when i brush the floor, plastic brush or wire brush, this stuff still there. not as noticeable anymore. not as thick or brown. but a thin pale cloud still there when i brush. had 20ppm of clorine constantly at least since may 10th. what else could this stuff be:

my pool is plaster- could this stuff be residue from the plaster like if plaster was wearing away?
could it be residue from all the tri-clor ganules i've been putting in?
could it be pollen?
again, this stuff is not in patches or some here and some there. it is evenly distributed throughout the whole pool flooor and walls.
i have nothing covering my pool. its opened to the environment. should i just assume that i'm always gone have something on my pool floor whenever i brush, like dust/silth and it's never going to be completely clean?

assuming this stuff is algae, and it's dead, if i throw in some algae preventer will it still work?

how can i know what this stuff is? i have made some progress thanks to this forum's advice. just wish i could get rid if this stuff completely so that i know my children will be safe going in.

ps- the distilled water i've been using to do the shotglass cl measurement has fluoride in it. would this throw off the readings?