I like maracyn cause even my local Walmart has it. It does work. Easy access. The other stuff would have to go to a lfs for it. Plus Walmart is 24hrs.
IME, in a healthy established filtration system, Kanaplex will not have a negative effect on your bio bacteria. Having said that, I would start with just regular salt (sodium chloride) & plenty of clean water. Good luck Frank, and Happy New Year!