All the brine leaked out of a jar of my pork frogs somehow. To keep them from drying out, would it be okay to use a brine of dechlorinated tapwater and salt to replace what was lost?

Fill it with you favorite "worm juice"

Good idea.

Too late, but you may want to do this in the future:

Put some petroleum jelly around the top where you screw on the cap. This will stop the corrosion, etc. that can happen to the metal.

Use some cling wrap over the jar's opening before screwing on the cap.

Just food for thought.  

Too late, but you may want to do this in the future:

Put some petroleum jelly around the top where you screw on the cap. This will stop the corrosion, etc. that can happen to the metal.

Use some cling wrap over the jar's opening before screwing on the cap.

Just food for thought.

It took them years to change, but the Uncle Josh stuff I have has plastic covers.  Bought last year.

But, since a lot of plastics are salted, I'd make a super saturated brine solution.  Put some water in a pan, add more salt than it can dissolve, then heat it on the stove.

Don't need to bring it to a boil, but get it good and hot.

Allow to cool, then pour into your containers.  You'll have some undissolved salt at the bottom of your pan.  Don't need to put that into the bottles, but it won't harm anything if you do.

Decades ago, I knew striper fishermen who did this to store plugs that were rigged with eel skins.  The hooks were removed from the plugs, the eel skins pulled over the plug, secured by stainless steel wire that tightened the skin into a groove cut at the head of the plug.

They'd remove the hooks for storage to prevent rusting, and so they could keep an assortment of skin rigged plugs in the same brine container without getting fouled in each other.