Need help with algue in a oxygen pool

[chem geek]

Ben is correct that potassium monopersulfate is NOT a disinfectant. It does not kill bacteria quickly enough to pass EPA DIS/TSS-12 nor DIN 19643 at swimming pool temperatures. These stringent requirements require 6-log (99.9999%) kill times in 30 seconds or less of Escherichia coli while MPS at 77ºF only does a 16.8% inactivation in 2 minutes so a 6-log kill would take around 10 minutes assuming one is maintaining a consistent MPS level. The only time it is used as a disinfectant is at hot spa temperatures along with silver ions as in the Nature2 product (the higher temperatures along with some effects from the silver ions combine to speed up kill times).

It is a selective oxidizer though I wouldn't say it is great. In spas that use silver ions + MPS, they usually need to use chlorine once a week or so to keep the water clear. MPS will oxidize some chemicals that chlorine won't and vice versa. As one example, in this paper, it was disclosed that MPS does not react very quickly with ammonium ion. Since chlorine does react quickly, monochloramine will be formed and MPS does not react with it before chlorine either. In the past, people were saying that MPS would oxidize ammonia and other chemicals before chlorine got a chance to and would therefore prevent disinfection by-product formation, but at least for ammonia that simply isn't true. MPS can react with unsaturated organic compounds (i.e. those with carbon-carbon double bonds) to form epoxides that can make them more soluble and it appears to oxidize creatinine and some other organics, possibly faster than chlorine though it does not appear to oxidize urea which is the largest nitrogenous component of sweat and urine (at least not without metal catalysts).

MPS can also be irritating, though this mostly comes from the minor contaminant potassium persulfate (aka peroxydisulfate) of 3% in Oxone. This irritating contaminant can be quickly removed in the presence of silver ions which is probably why Nature2 using silver ion and MPS is not normally irritating.

[PoolDoc]

Thanks for the subscription, Amanda.

I show you as using the " Tele Satelite Mazarron S.L." network. This is important, because I actively block traffic from non-English speaking countries. The problem is that the overwhelming majority of traffic from outside the US, Canada, and Australia is from spammers and hackers. The percentage of bad traffic ranges from 100% (Russia, Ukraine), to 99% (China) down to 75% (Germany, Spain).

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I'm

[PMS SAyMI]

Ah Thanks Ben really appreciate it and that was why I subscribed I picked my trickiest problem posted the question to see what ideas anyone would have and then was so astounded by the replies decided I did not want to miss a thing - we have recently changed alot of things in our company and at the moment are leading with one other company for being the best in the area it is my aim to overtake them and be the best, I really think your forum and many experienced people on here will help me do that.

I dont want to sound nasty I think if we are honest everyone of us strives to be the best, we never slag other professionals just try to be the more helpful, with good prices and excellent products and advice and hope people see that and come back so far it is working, and we have different nationalities within the staff to try to please everyone which really works with such a huge expat community here.

[PoolDoc]

I'm curious; I recently saw these two photos in , and wondered if these were at all typical.

The first photo is reported as being on Menorca; the second in Kent. Of course, you may not know, but you'd be more likely to, than I am. The number of Intex type pools in the shot from Kent surprised me even more than the photo from Menorca.

[PMS SAyMI]

Hi Ben,
The Menorca one looks exactly right and exactly like the area I live in, however the kent one looks like mostly plastic paddling pools which would also be right if they were having a good summer they are cheap to buy installed quick and easy and most people just throw them out after the summer, in the kent one I can only see what looks like one in ground pool.

Amanda

[PoolDoc]

Wow. I just wouldn't have guessed there were that many pools in Spain. Are those vacation rentals, expat homes, or do they typically belong to native Spaniards?

[PMS SAyMI]

a bit of all 3 to be honest but my area has a huge expat community and loads of rental properties and the natives are only just starting to buy into the area in the last year or so - looking forward to a slightly more balanced future now that is has just been confirmed that paramount pictures are building there next theme park here 20 mins up the road if you fancy a holiday will be finished in 2014