Yep, I agree with that Jeremy. Feeds on the limestone in the granules, right? That seems damaging, right?? I also noted they called it an Algae, when I have understood it is technically a Bacteria (GM).
What percentage was the SH that you used? As far as the (lack of) result; late in the evening shouldn't matter, pitch shouldn't matter, not rinsing shouldn't matter. I know you posted this weeks ago, but, do you have any additional info to add? Have you gone back, tried again, etc?
Good info, good to know. I have a mean green and have not really had any issues with it. Occasional kink now and then, but nothing like what you have in this video. Have not experienced any crush issues with the connector ends as of yet. Thanks for the informative comparison.