Can treating a spa be easy?

[Vinny]

If I fill a 450 gallon tub with tap water. What would one suggest I add to the tub get the 3 to 5ppm level of chlorine in the water? In precise measurements.

To get precise measurements we need to know what is the available amount of chlorine that is in the dichlor your using ... it's not the 99% active ingredient. Dichlor can come in from 52% to 62% available chlorine. At your gallons, using 62% available chlorine - 3 not so heaping or not so level teaspoons or 1 tablespoon of the same amount of chlorine will give you about 4 to 4.5 PPM chlorine!

How's that for accuracy!!!

[Vinny]

I asked about the measurement because 2 level tsp should only be 4ppm in your tub.  The extra material in the "heaping" portion explains your test results of "over 5".

As far as ozone, let's let that dog sleep for awhile in the new year.

This is a problem when trying to cut the amounts to bare minimums ... my teaspoon (or tablespoon) isn't exactly the same as someone elses. I would be crazy to stand there and scape off the excess chlorine that is above the 1 level scoopful. Sometimes I don't really add a teaspoon (close but not quite) depending on how I dig into the chlorine.

Aw comeon, lets start the new year right ... lets discuss ozone right off the bat!  I really want In_Canada to send me one of his 60,000 watt ozone generators with the 40' mixing chamber ... I guess I will need to invest in a oil refinery to heat the water up though! 8-)

[Reese]

... At your gallons, using 62% available chlorine - 3 not so heaping or not so level teaspoons or 1 tablespoon of the same amount of chlorine will give you about 4 to 4.5 PPM chlorine!  How's that for accuracy!!!

Not so good!  Perhaps, my post happy hour math is bad, but I think the answer is closer to 5.5 ppm.

Repricej1, take a look at the formula I posted for Drewstar earlier in this thread.  There are also published charts that show you the required dose for 1ppm in different sized tubs.  At 55% available chlorine, you need 2tsp for 3 ppm, and 1 slightly heaping tbl for 5.  Then you have to adjust for residual chlorine, bioload, pH, actual chlorine percentage of the product you are using, etc.

[bluesman]

Not so good!  Perhaps, my post happy hour math is bad, but I think the answer is closer to 5.5 ppm.

Repricej1, take a look at the formula I posted for Drewstar earlier in this thread.  There are also published charts that show you the required dose for 1ppm in different sized tubs.  At 55% available chlorine, you need 2tsp for 3 ppm, and 1 slightly heaping tbl for 5.  Then you have to adjust for residual chlorine, bioload, pH, actual chlorine percentage of the product you are using, etc.

Reese. Where would I find the published charts for determining the required dosages. :-?

thanks

[Chad]

Reese. Where would I find the published charts for determining the required dosages. :-?

thanks

Here is a link to the formulahttp://members.aol.com/pssoft/dosages.htm

[Chad]

Here is the formula and an example from the link above.

Chlorine: US weights:  % is available chlorine in compound, 65% = .65
 Raise: ozs chlorine = gals x ppm x .000128 / %

 Ex: To raise chlorine 10,000 gallons 1ppm
   1.97 ozs calcium hypochlorite (65%) = 10000 x 1 x .000128 / .65

So if I want to raise my 336 gallon spa 3ppm with my 55% available chlorine dichlor product, this is the formula-

336 x 3 x .000128 / .55 = about .2345 ozs (about one heaping tsp)

If I make the switch to a product with a higher % available chlorine, let's say 62%.... the amount I would have to add to get a 3 ppm would be about .2081 oz. That's only a .026 difference. I don't know if that would be worth it or not. :-/

[Chad]

If I fill a 450 gallon tub with tap water. What would one suggest I add to the tub get the 3 to 5ppm level of chlorine in the water? In precise measurements.

To get exact we need to know the % of available chlorine in your dichlor. I'll just use 57% for an average as most products are between 52-62%.

for a 3ppm- .30 ozs(about 2 tsp)
for a 4ppm- .40 ozs(about 2.5 tsp)
for a 5ppm- .50 ozs(1 tbs)

[Vinny]

Not so good!  Perhaps, my post happy hour math is bad, but I think the answer is closer to 5.5 ppm.

Repricej1, take a look at the formula I posted for Drewstar earlier in this thread.  There are also published charts that show you the required dose for 1ppm in different sized tubs.  At 55% available chlorine, you need 2tsp for 3 ppm, and 1 slightly heaping tbl for 5.  Then you have to adjust for residual chlorine, bioload, pH, actual chlorine percentage of the product you are using, etc.

I was talking real world figures ... my tub is supposed to be 400 gallons, so I give it 380 to 420 (I do not measure the amount of water I put in) (and lets not forget evaporation and splash out) If I put in 1 heaping teaspoon of 62% chlorine that gives me not quite 2 PPM and when I use 2 teaspoons it comes out to about 3 PPM.

According to Taylor, 0.08 oz of 60% chlorine in a 400 gallon tub will give you 1 PPM chlorine and a teaspoon is 0.16 oz. so it should give someone with 400 gallons of water 2 PPM but do you actually have  400 gallons of water. Are you using pharmacutical grade measuring devices or the dollar store? (I use dollar store) Theoretics are great but real life is where it's at! 8-)  Remember ozone IS supposed to work in disinfecting water ... need I go on?

[bluesman]

Here is the formula and an example from the link above.

Chlorine: US weights:  % is available chlorine in compound, 65% = .65
 Raise: ozs chlorine = gals x ppm x .000128 / %

 Ex: To raise chlorine 10,000 gallons 1ppm
   1.97 ozs calcium hypochlorite (65%) = 10000 x 1 x .000128 / .65

So if I want to raise my 336 gallon spa 3ppm with my 55% available chlorine dichlor product, this is the formula-

336 x 3 x .000128 / .55 = about .2345 ozs (about one heaping tsp)

If I make the switch to a product with a higher % available chlorine, let's say 62%.... the amount I would have to add to get a 3 ppm would be about .2081 oz. That's only a .026 difference. I don't know if that would be worth it or not. :-/

WHYNOT,

Thanks. This is good stuff!

[Chad]

WHYNOT,

Thanks. This is good stuff!

Your Welcome..........I got the best stuff in town.

[Reese]

I was talking real world figures ... Theoretics are great but real life is where it's at!

:-? This from a man with 2400+ posts?  I think we both need to get off the computer and into our tubs!  

[Vinny]

:-? This from a man with 2400+ posts?  I think we both need to get off the computer and into our tubs!  

You are absolutely right!!!!