Can Orenda products be used with a chlorine shock?

Most Orenda products supplement chlorine and are compatible with high levels of free chlorine.

With the exception of SC-1000, yes, Orenda products can be dosed along with a chlorine shock. In the case of PR-10,000, it will work regardless of chlorine level. With CV-600 or CV-700 enzymes, best results are with free chlorine levels below 20 ppm. And for what it's worth, if you're shocking your pool over 20 ppm, we have bigger issues to discuss.

PR-10,000 and chlorine shock

PR-10,000 pairs very well with chlorine, and you can use it in the most extreme pool chemistry situations. Green pool? Check. Murky, cloudy water? Check. Can't hold a free chlorine level, or need to super-chlorinate to reach breakpoint chlorination? Check. PR-10,000 will not be affected by high chlorine levels at all.

CV-600/CV-700 enzymes and chlorine shock

CV-600 and CV-700 also pair well with chlorine. Provided the chlorine dose is not insanely high, like over 20 ppm, they will work just fine. We often purge with enzymes and PR-10,000 immediately following a chlorine shock. Such a sequence is the basis for our Green Pool Cleanup procedure and the "Orenda Bomb".

If chlorine levels exceed 20 ppm, you risk the chlorine being concentrated enough to attack the enzymes themselves. And in truth, we do not have a way of knowing exactly what threshold this can occur at, and we don't expect to ever shock heavily enough to find out. We have done some vicious green pool cleanups with chlorine levels 15-20 ppm without any issue at all. The enzymes worked great. 

We just know that at some point, the chlorine will attack enzymes. But since we see no practical reason for ever shocking to or beyond 20 ppm FAC, this issue has not yet been a concern for Orenda users.

CE-Clarifier and chlorine shock

As far as we know, chitosan and the CV-600 in CE-Clarifier are compatible with high chlorine levels too. We have no evidence to the contrary, though generally CE-Clarifier is not used in a superchlorination situation, because an enzyme purge would be.

SC-1000 and chlorine shock

SC-1000 and chlorine will conflict, but only if SC-1000 has not yet had time to do its job (chelate metals and minerals). If SC-1000 was already in the water and has had time to bind to calcium and metals, there should be no issue chlorinating heavily in the water. Chlorine will not wipe out SC-1000, and since SC-1000 is bound up, it will not wipe out chlorine either.

The conflict usually presents itself during an SC-1000 purge, which will wipe out free chlorine levels. This can zero out chlorine for a few days. The duration of the chlorine depletion depends on water temperature and how long it takes SC-1000 to find the metals and minerals it seeks.

We have personally purged pools with SC-1000 and watched the ORP plummet within minutes. Such a strong dose of SC-1000 is enough to wipe out very high levels of chlorine in minutes because chlorine attacks it (not knowing what SC-1000 is). SC-1000 is immune to chlorine oxidation and therefore remains in the water while free chlorine is reduced to useless chlorides. Hey, it's great for SC-1000 staying power, but obnoxious for trying to maintain chlorine levels. This is why we recommend initially purging before chlorinating the pool at the beginning of the season (or during startup!). If that's not possible, divide up the SC-1000 purge dose over 3 or 4 visits so chlorine levels are not wiped out completely.