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Thanks. Do you think our salt water hot tub would suffice which has 3ish ppm of chlorine? I might even be able to fill the bladder from our well water filtration system. We have a chlorinated reaction tank with a valve after to check for free chlorine which we keep at 1ppm.
This seems like a very interesting place to dive. I might have to read more about this site. $230 for the class is high but sounds like they provide a lot of great instruction.
Sorry, but I do not know what levels of salt or chlorine are suitable for killing the zebra mussel larvae other than what was in the course documentation as I described in my previous post.
There are several videos on YouTube on diving Spring Lake to give you an idea of what it is like.
Lots of info here on how to kill zebra mussel larvae on gear.
https://www.fs.usda.gov/Internet/FSE_DOCUMENTS/stelprd3806222.pdf