Are "Spa Metal Free" and "Metal Free" identical?

I wouldn't assume that without actually comparing the ingredients of one to the other.

Spas are often sanitized with Bromine instead of Chlorine, and have certain products that work just for Bromine, or could even have something that if mixed with Chlorine could be dangerous.

In this case, it may be perfectly fine, but I really don't know.
 
I'd "guess" that the spa version is more diluted, more expensive and in smaller quantities, but that is only a guess. I'd do as Buggsw suggested and compare the ingredients.

Dave
 
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