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One point i think is worth noting. The halogen sanitizers are very good at killing a bunch of known pathogens (see cdc website for kill rates) but not so good at controlling biofilms . Conversly, AC quats are very effective with biofilms but not so good at sanitizing. The combination is...

I knew i left something out! There are a couple of conclusions thus far 1. With AC on board, the water stays healthy longer without attention (extended absence) compared to sanitizer alone 2. With AC on board, recovery from sanitizer sins is much easier. Shock restores water to usable...

Hi all; been a long time since I've posted here, and several years since my original experiementation with ahh-some and biofilms that started way back in 2013. As most know, the makers of Ahh-some have produced another interesting product by the name of Aqua Clarity, which I'm sure needs no...

This has been my experience as well. I watch TA but don't make adjustments to target specific TA values, which I find just causes much tail chasing. So, many years ago I quit listening to the Spa stores quote from books, and now I just let TA do what it does. My source water TA is a bit on...

nice info folks! glad I am able to join the party and report my results as well. nice thread. I did a little math comparing the cost of AC with that of Spa Marvel, and it looks to me like Spa Marvel is about three times the cost, for one year. And, as I pointed out in the thread I just...

Greetings all, I haven't been quite as active in my spa experiments lately, but I just finished up a couple of interesting ones. the write-ups are posted on my hobby site rvdoug dot com, but I don't want to just post a link here because it might look like spam. so PM me if you are interested...

Greetings all, in case you are interested in my work over the last few years, I have just completed another purge shootout, comparing two "new" (to me) products to ahh-some. The first, is produced by SpaGuard, ("System Flush") which really isn't intended to release biofilms but i tested it...

congratulations! you have completed the rite of passage that many have not! Its just sad that mfgs don't get it. even worse -- that they (and the customers who believe them) are operating spas with this stuff hidden in the pipes, blissfully unaware. I talked to one mfg who specifically said...

if you are certain this is calcium scale (acid dissolving it, is strong evidence, I admit) then I think I would attack this a little differently. Since Scale responds to low pH you may need to do some more research on eliminating scale build-up without damaging your equipment. Lets have the...

Im scratching my head but just noticing the time coincidence. If the flakes appeared coincident with the ozone then that could be a clue that the residue isnt purely scale.

hmm. the introduction of ozone might be a coincidence or it might be important. it does sound like scale, but in any case I agree with RD and others -- I think you should do an ahh-some purge

first of all -- the makers of ahh-some clearly know their stuff, and especially for the first drain/purge it is VERY important to remove the filters from their normally-installed locations. this is because ahh-some will/can remove large amounts of material which can clog up your filters and...

Im getting very positive results with "Hot tub Serum". And i have coached folks through multiple purges! Keep at it. Purge until you get an ahhsome dosed spa releasing no new material https://boisediesel.com/blog/2016/7/spa-purge

Of course. Good stuff ! Man its good to see good science. Hot tub serum is epa registered for its intended purpose and due to its concentration cannot be considered a sanitizer. Disinfectant wipes and restaurant surface ckeaning solutions are orders of magnitude stronger concentrations in...

Yea im well aware that adbacs have a clarifying property but its evident that, while there is no claim of sanitizing properties i don't think you can conclude that no bacteria was harmed lol during the experiment. Good to see that ADBACs have some airtime finally. Ahhsome itself ive shown...

this! I find that chasing a TA number is just not fruitful. and in a portable acrylic spa you can afford to let the saturation index go negative; I find some surprisingly low TA numbers in my spa ( if you target the saturation index) , but they are a don't care. I'll test to make sure...

I usually save a bucket of ahh-some dosed water and use that for a cleaning solution . like the spray bottle idea though thats good.

Greeetings all, I haven't posted here for a while but some of you may be familiar with my work in testing various purge products, and this has grown to a data-driven understanding of how these products work. Those who have seen my posts know that I have done head-to-head comparisons with...

Bingo. Lots of blissfully unaware folks have high sanitizer decay rates due to live biofilms and just cover up problem by adding chlorine

In your situation i would purge again. My spa was delivered with biofilms from day one. Took me several purges . This is my work that established ahhsome as the only serious purge product https://boisediesel.com/blog/2016/7/spa-purge

Yea you did the right thing. You can also save some ahhsome dosed water in a bucket for the filters. In fact i do that anyway for wiping stuff down. In one of my experiments i showed that biofilms accumulate in the filter media by cleaning them first with a degreaser. Then when I had a...

0 Got any references/ citations? This is precisely why a purge that breaks up and releases biofilms is most effective, and confirms why a traditional decon is relatively impotent in the fight against biofilms

That's a good summary! I would only add to my own epistle that impecable water maintenance in a portable spa may reduce the need for shocking but not the need for purging

Well my basic tenant is that those of us who are proud of our water maintenance skills are still vulerable to biofilm growth and that we might not be as immune as we think. The evidence is growing that the particular conditions specific to portable spas (associated with very high bather load)...

This study was meant to study the effectiveness of 1-3ppm FC in a swimming pool, and there is no mention of CYA (that I found), so you'll have to draw your own conclusions on that. It was a laboratory simulation. I posted for the benefit of those who accumulate the weight of evidence that's...

Greetings Hot Tub enthusiasts Those who are familiar with my work know that I have spent large amounts of time and water, testing various purge products. This post is not about that - it is instead dedicated to the little-known fact that biofilms can apparently survive and even grow in the...

I'm a bromine user and a big fan for 30 years. What you have noticed empirically I have established experimentally -- bromine with ozone is a beautiful thing! Here's a few thoughts of mine on the subject 1. this is a personal preference thing of course, but over the years I have developed...

Most of us have acrylic spas with pvc plumbing so i have to admit it would be weird thing to me is that mfgs could go a long way (and with minimal expense) towards mitigating this problem but they don't. Its astonishing how much the industry is filled with nuance and emotion both on the...

The notion that new spas are immune to biofilm contamination is a myth advanced by the mfgs and dealers who want you to think that. I have personally talked to both. Wet testing at the factory followed by storage and transportation delays, gives the bad guys ample time to grow...