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Most your chlorinating liquids go by trade percentage while the bleach goes by weight percentage. http://www.troublefreepool.com/threads/66522-Bleach-concentration-per-unit-volume-and-other-calculations?p=565948&viewfull=1#post565948 So Great Value Bleach is 8.25% by weight and Kemtek is 9.21%...

Updated. Had to fix a problem with the specific gravities changing back which wasnt an issue if it wasnt being changed. Just out of curiousity, how many people are using this calculator so I know I'm not wasting my time?

Updated. Changed the bleach calculations so now each one uses its own specific gravity for improved accuracy instead of using a static specific gravity. This is user adjustable and the specific gravities are hidden beside the "notes" field. This should be considered an "Advanced" option and...

I read this on here the other day and I thought it was a good ideal in a situation like this. Get 3 samples from the pool in clean containers with no headspace and let 3 different people get test results from the same pool store and see how much they vary. One could be you, another could be the...

12x30 AG Intex =1600 gallons? You will have to aerate the water somehow, which will drive up the pH. Then you add acid to lower the pH and repeat. How often have you been adding acid?

Here ya go http://jfhtm350.webs.com/pool/FillWaterCalculator.html 3rd calculator down. Made that today.

My uncles above ground pool has been completely drained for years now and is still standing although the liner is ruined and there are some weeds growing in the bottom. I would at least leave enough water in it to keep the liner seated. You could leave all the water in it too if you wanted. Just...

I'd agree with Rocco. It wont do any good to winterize it since it more than likely will be green when you get back because of the temperatures. Hiring someone to watch over it for 4 months would probably not be very cost effective. If they used trichlor tabs for chlorine like may of them do...

Is it an intex pool or regular above ground pool? How many gallons?

1) Drain the water off the cover (as much as you can get) 2) Loosen cover straps (Dont do this on windy days) 3) Pull out air pillow and tie rope to both ends 4) Put air pillow back in on one side 5) Run one end of the rope under cover back to the opposite side and pull your pillow back to the...

Oh ok. I remember seeing that somewhere now. If that is the case then I would use the TC reading and add enough bleach to raise the TC to slam level. That should help to get things straightened back out. Slam Level FC is 24ppm...

I dont know what is in Jack's #2 Copper or what the instructions say to do, but if you put chlorine (FC) in your pool it is there instantly (giving it time to mix before testing of course). The FC is either being eat up by Jack's #2 Copper ingredients, Jack's purple, algae, or other organics. If...

No. You still have to have the same amount of chlorine for your cya level whether you use bleach or a swg. Also a salt system requires around 3000 ppm of salt to be in the water. If your skin doesn't like salt then a salt system probably wouldnt be for you. Using bleach as the source of...

Have you tested for borates? It is possible to have borates and not know it which would explain why your adding more acid. Some trichlor and dichlor products have borates amongst other things in them and may not tell you about them. Take for instance the Dichlor shock product by Aqua Chem: Aqua...

When your FC level gets to 10ppm or lower then you should get a reliable reading. It could take a few days after your done slamming. It just depends on the water temperature and sunshine.

Here is a thread about it: http://www.troublefreepool.com/threads/41177-Borax-amp-Bugs Also seems like I remember the soap gums up the sand filter.

Kentucky Fried Chicken has a complaint box. Although your probably better off using it for toilet paper when you eat their bloomer pudding. LOL.

Thats what algae looks like when chlorine attacks it.

My understanding is that phosphate removers only remove the inorganic type and not the organic type. I didnt see that mentioned. Somebody correct me if I'm wrong here.

You have to wear the pantyhose for at least a week to break them in before they will fit the return fitting.

Did you see any sand in the filter when you had it open or was it all filter glass? You may just have to let the sand in the pool settle then vacuum to waste as denniswiseman pointed out. That bypasses the filter. That may not fix your filter problems but it will at least get rid of most of the...

Here is another good thread to read: http://www.troublefreepool.com/threads/19496-Mulitport-spider-gasket-sand-in-pool It doesnt sound like your spider gasket, but do like Jason says and tie a stocking to the return to see if you catch sand or whatever material it is. It helps to have some...

Do you suppose this kind of stuff is in it? http://www.intheswim.com/Pool-Equipment/Pool-Pump-and-Pool-Filter-Accessories/FilterGlass/ Never used anything like that. It says its 20% lighter than sand. I use #20 filter sand. You will have to scoop most of the media out of the filter to pull the...

Here is something you can try: http://www.troublefreepool.com/threads/7289-My-sand-is-quot-channeled-quot-how-to-fix-it Sounds like your vacuuming a ton of sand up into the filter. If the sand in the filter is not channeled, the sand your vacuuming up will just add to the sand in the filter...

If it were mine, I would peel back the cover and drop in my utility pump rig to circulate the water and slowly add some bleach to bring it back to shock level and to mix the gunk with the chlorine. I usually do this about every month anyways to keep a check on my chlorine level when its closed...

Boric acid will probably be 100% or 99% pure. If that is so then you have the right one. Anything can be cheaper at the right price. That last time I looked around Dudadiesel.com had the cheapest price. Not sure about the shipping cost though. http://www.dudadiesel.com/search.php?query=boric

Ok. Well thanks for the replies.

So trade percent doesnt take into factor the specific gravity of the solution (the actual weight per gallon). From the many msds sheets Ive been through this is an "average" specific gravity that I come up with: 12.5% = 1.2 10% = 1.16 8.25% = 1.13 6% = 1.09 5.25% = 1.08 That is...

Well that explains the bigger gap between the available chlorine and percentage for 10% and 12.5%. The "bleaches" available chlorine is 95% of the weight percentage. Is 10% trade is really 9.24% and 12.5% is really 11.34% weight percentage? How did you calculate that?

What does the percentage of sodium hypochlorite on a bottle of bleach or chlorinating liquid mean, by weight or volume? Ive looked on a bottle of bleach but it doesnt specify. Sodium Hypochlorite .... 5.25% - (5% available chlorine) Sodium Hypochlorite .... 6% ---- (5.7% available chlorine)...