Chlorine drop to ~0 ppm after calcium addition. UPDATE: Now with controlled test.

[JupiterFL]

I used 21 lbs of the same brand, around the same time, from Amazon and didn’t have any issues. It’s a strange phenomenon for sure. I pre mixed mine in a 5 gallon bucket (I know, frowned upon), 5 lbs at a time. Don’t see how that could make a difference for the FC loss, but idk….

 

[Brian PacNW]

Thanks, @JupiterFL. I was hoping someone had used the same brand to see if there was a similar issue. Very interesting that there wasn’t.

I also premixed mine in a bucket.

 

[plnewb]

Brian, for science, would you be open to mixing the calhypo in a beaker or testtube of distilled water, test FC of a sample of it, then add another calibrated amount of calhypo and test to see how it affects the FC?

We can as a group figure out what the exact amounts and method needs to be, but there seems to be a conflict between members about the effect calhypo should have on FC and this could be a fantastic experiment and handson investigation to address that conflict

 

[Brian PacNW]

Unfortunately I threw the calcium chloride in the trash not long after my little experiment.

 

[plnewb]

Understandable. unfortunately with clueless resellers like Robelle we will now never know what the rest of the ingredients were and how the calcium chloride behaves. Maybe next time I will buy some calcium chloride if WM stops selling me LC for $6/gal shipped to my door