Borates calculator

[Phillbo]

OK.. I was right.... just seems to be a LOT


thanks for checking my math !

[kirkdbjl]

What does the Borax do and does it affect the PH or Alkalinity

[Watermom]

Borax is used to raise pH with minimal effect on alk as opposed to soda ash which raises both.

[waterbear]

What does the Borax do and does it affect the PH or Alkalinity

Borax used in this manner along with muriatic acid to keep the pH balanced is a secondary pH buffer and algaestat. IMHO, it is a very useful additive and almost a necessisity with a SWCG but beneficial to any pool! It has mimimal impact on TA but really helps stabilize the pH around 7.6 to 7.7 for longer periods of time than without.
It also will deter algae for much longer than without. (I go on vacation every summer--we are talking about July in Florida--and I just shut off the pool for two week and when I come back it might be just a tad cloudy but it is NOT green. I just shock it before I leave and maintain 50 ppm borates. If I did not have the borates in the water my pool would be green in a week or less!)

There are other benefits to borates but the are subjective (water 'feels better", it sparkles more, etc.) These effects are reported over and over again and possibly have to do with how the borates affect surface tension.

[Jbonnette]

When adding a large amount of borax / muriatic acid (or any chemical), is there a rule of thumb for how quickly to add them?

[Watermom]

Are you asking how fast to pour something in or how much to space apart additions of different chemicals?

I can tell you that it is never a good idea to add large doses of anything at one time. Better to dose gradually and sneak up on a target than risk overshooting it.

[Jbonnette]

Are you asking how fast to pour something in or how much to space apart additions of different chemicals?

I meant how much to space apart additions of different chemicals. But being a newbie, both would be good to know . I need to add around 100lbs of borax and 6 gallons of muriatic acid to get to 50ppm borax.

[chem geek]

I would split up the doses and since you've got gallons of acid you could add one gallon of acid and then 100/6 = 16-2/3 pounds of Borax, then acid again, etc. If you add slowly over a return flow in the deep end, then I would wait 5 minutes between additions which should give a reasonable amount of mixing assuming you've got some decent circulation. Put the pump on high if it's a multi/variable speed pump. Also, be sure to lightly brush the side and bottom after doing each addition to ensure thorough mixing. From the quantities you've given, it sounds like you've got a pool around 27,500 gallons or so, is that right?

[aylad]

I would allow at LEAST two hours between doses (with the pump running) to give the chems a chance to properly mix in the pool, then retest before you add more.....

Janet