I would suggest reaching out to Eddies directly. If you google "Eddies Aquarium" you will be able to find the number and ask them directly for specific numbers.
I was just there, did not see the message until I got home. I know he sells RO water not sure about salt. Like the other poster said give them a call or message them in Facebook.
I only buy r/o fresh. Sorry.
A gazillion $
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