Yeah, I just saw that today myself (we must have both read the link from another pool forum about the same time). The paper says, in much greater detail, what we've been saying all along and backs it up with experiments to boot. It's too bad the JSPSI organization and journal look like they have gone away. In its absence we have myths.
And take a look at the bottom of
this link in the same website for an article that describes how the kill times for bacteria track hypochlorous acid concentration and that the chlorinated isocyanurates are not effective disinfectants but act as a reservoir for chlorine. This is consistent with other studies. What would be more interesting is a similar study for algae prevention since killing bacteria is easy and needs very little hypochlorous acid. We have the experience of hundreds of various pool forum users showing that disinfecting chlorine level (i.e. Ben's chart) is what prevents algae growth (there was one user with extremely high phosphates who recently reported otherwise, but that's the only exception I've seen).
And there is
this link that has an article about the Langelier Saturation Index and its applicability to pools and says it is a misconception that the index only applies to closed systems. Lots of articles here pretty much saying the same things talked about on the Pool Forum and here. On this same page at the bottom is an article that says that the LSI is not a corrosion index but scale dissolving tendency, though I would consider the dissolving of calcium carbonate from plaster to be "corrosion", though it is not metal corrosion.
The last article in
this link talks about the relative buffering of carbonates, borates and cyanurates.
This link has a wealth of useful info including interesting tidbits of chlorine not breaking down urea very quickly and ozone not being effective at oxidizing ammonia, urea or monochloramine.
At
this link there is an article that refers to keeping CYA in check not only to maintain chlorine disinfection capability, but also for algae control.
At
this link there is reference to thermal decomposition of chloroisocyanurates which is useful info since that is a different process than breakdown from sunlight. But something about this doesn't make much sense as CYA levels do not drop and the same article refers to 14% per day decomposition but only 1% per day drops in FC. Notice also the article with equations for calculating pH and TA from acid/base additions that sounds like a simplification of my spreadsheet that would be useful for the online calculator and for BleachCalc.
And
this link a little ways down says the following:
Hydrolysis of hypochlorite ion (C10- + H20 D HOCI + OH-) temporarily increases pH. However, the effect, which is significant (-0.2 pH units) with a shock dose, will disappear when the chlorine dissipates (Wojtowicz, JSPS1, vol. 3, no. 2, p. 34, 1999).
So, what happened to John A. Wojtowicz who wrote most of these articles?
Richard