HCA: Hermit Crab Association

Hello!
I'm new here and I have these two hermits crabs called M&M and Hallow!
And I have this zoo med product called salt water conditioner should I use it and if not do you have any better recommendations?

Here is all you need to know about water for hermit crabs but were afraid to ask

https://hermitcrabassociation.com/phpBB ... 56#p852656

Thanks!