Trying new method _Dichlor-then-bleach method

Jump to latest Follow Reply
M

mikemedic

0
Apr 21, 2008
77
Hello
I Just changed my water, going to try the Dichlor-then-bleach method. I did the bromine method but family complaining of fumes.

So I followed the start as described. 450 gallon Jacuzzi Hot Tub with ozonator.

I balanced the water, then added 1 ounce of dichlor, so that means FC should be at 10 and cya is 9? I checked the FC the next day and got a zero reading?

I am using a professional Taylor Test kit with powder and drops for the FC

So I added another 1-ounce , took reading today and now FC is at 1 PPM. all other levels ok, so I added another one ounce.

Will retest tomorrow.

So I have added a total of 3 ounces of shock ( dichlor) so my CYA should be 3x9= 27 correct?

Why is my FC not going up 10 ppm with every ounce I add ? does ozonator affect this? I am on the right track? any suggestions?

Thanks
 
Thanks, i will keep an eye on the FC level, dont know how to turn the ozonator level down?

I hope I made a good choice

I think the fumes were bromides and I had not changed my water in a while, I will start with the bleach now

thanks
 
Was anyone using the spa as you have been adding the dichlor? If so, then much of your FC may have been going to oxidize bather waste. It takes about 7 ppm FC per person per hour (at 104F) to oxidize the waste.

If no one has been using the spa, and if you continue to loose more than 25% of your FC per day, then a tub decontamination is in order. See the link to the decontaminaiton procedure in the Dichlor then Bleach post
 
If you do not use the spa every day or two, then having an ozonator will make the daily chlorine loss with no bather load at least double if not more, so a 50% or greater loss per day. This is why having an ozonator makes sense when you use the spa frequently, but not if you don't. Dichlor-then-bleach might be a pain for you if your ozonator is powerful and you don't use the spa frequently. The ozonator may be on when the circulation pump is on so you might be able to lower your pump on-time to adjust the ozonator output.

Ozone will also convert bromide to bromine so again if it's powerful and you created a large bromide bank (or built one up from using bromine tabs), then the ozone may be creating too much bromine and you found that to be too smelly.
 
Dang
I do not want to go back to bromine, we maybe use it once a week. Any ideas for using chlorine or something else besides bromine? SO I guess it a good and bad thing to have an ozonator?

Please any suggestions?



Help
 
Well, another approach would be Nature2 with MPS where you just shock with chlorine every now and then, usually once every week or two. The ozonator shouldn't interfere with the MPS.

Of course, you could see about disconnecting your ozonator or otherwise turning it down or making it switchable in some way.

Another possibility would be more continuous chlorine dosing such as with the ControlOMatic TechniChlor. You would just need to make sure that your hot tub was able to handle the higher 2000 ppm salt level.
 
Thanks chem geek,
good plan, in fact Jacuzzi spas suggest nature 2 and MPS,

My question is what MPS level should work the best to keep at ? , and then maybe I will shock every other weekend or when large bather load

what should i shock at PPM? My cya is 30 since i added dichlor in beginning
 
If you use Nature2, just follow their instructions. The MPS level is generally measured by MPS test strips. I believe they target roughly 9 ppm oxidizer, but just go by the test strips which for MPS are reasonable. In terms of bather load, if there is no ozonator, then every person-hour of soaking in a hot (104ºF) spa requires around 7 teaspoons of MPS, but with your ozonator you might need to use half as much or perhaps even less.
 
You must log in or register to reply here.
Thread Status
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.
Top Bottom
Back
Jump to latest Follow Reply