Opened to a slimy pool:(

[freddyttt]

New testing done-

PH 7.2
FC 1 ppm (confused to why this has not gone up)?
Combined Cl. 3.4

iv added about 2 gallons of cl. throughout the day. also backwashed a few times as my filter started ton read over 20(pressure)
also, backwashing although lowers the pressure slightly it does rise quick over 20 soon after.?((normal around 12))


please advise.

thanks-


( I need more Taylor Replacement Reagents )
(is there a forum sponsor)?

[docsobeck]

the reason your FC is staying low is that you're adding bleach a gallon at a time. that's not even close to what you need for initial shocking of a pool that size with algae. i opened yesterday to the same sight, and i put in ten gallons last night, and it wasn't nearly enough. (18,000 gallon IG) i still have some green today. tonight i plan to put in 15 gallons or so. a very simple rule of thumb that i've used with pretty good success is shock at night and if your FC is down well below shock level the next morning, say around 1.5 PPM, shock again that night with 1.5 times as much as you used the night before. you have to keep shocking until the FC is close to shock level in the morning - if not, it means there's still a lot of living stuff in there using up the FC.

[freddyttt]

Thanks-

just added 7.1 gallons and did a full wipe down.
ill test Tuesday AM.

(11,000 gallon pool)


now the 7.1 gallons turned my pool green looking. i moved it around with my brush but should i be concerned about my liner bleaching? or staining?

thanks-

[docsobeck]

i'd be very mildly concerned about putting that concentration in a perfectly clean and stable pool, but if it's still green, probably at least half of it will get eaten up pretty quickly. i bet your FC is less than 10 in the AM, and probably less than 5.

[freddyttt]

reading of 4 this AM

added another 5 gallons this AM and just re-tested. iv got zero FC now can this be possible? thats almost 13 gallons in 24hrs and its gone

Help.

quick and important question. my DE filter PSI seems to spike with-in 24hrs of a full finger cleaning. 12-14 PSI to almost 30PSI. at this point it barley is able to suck enough water to keep the basket filled.

can this be caused by the algae dying off? i usually brush the walls and floor down after adding the bleach.

also backwashing does no good. ill take it apart and clean the fingers down.

[DanS]

Last year, I had a layer of green slime on my 20,000 gallon concrete pool. I added about 9 gallons of bleach. I backwashed about every hour or two, probably about 4 or 5 times. You need to backwash a lot to physically remove what is left of the slime after the chlorine works on it. After all of the backwashing, my pool was good to go.

[CarlD]

Yes this is very possible. You are fighting a full-blown algae bloom and it's going to take a lot of chlorine--there's no magic cure. You want to get your FC up to shock level (I think I said yours is 15 ) and keep it there. You need to check your water 2x to 3x a day and RAISE THE CHLORINE whenever it's low. If you can, get 5 gallon carboys (blue) of 12% liquid chlorine, spend the $5 on a nozzle for them (looks like a screw-on wine keg spout) so you can add a lot at a time. 1 five gallon carboy is the equiv of 10 gallons of Ultra bleach.

You don't need to worry about your liner bleaching--all the chlorine is going to go to kill organics--that's why it turned green.

good luck and prepare to fight it out!