i put some pond salt in my pond every few weeks its good for the fishes health. i also put sea salt in my inside tank to promote good healthy fish.

Pros: the fish need salt.

Cons: none

We use this in our pond every several weeks, and it does have qualities that seem to keep our fish healthy. It is the best thing I have found to date to use.

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[updated on 2008-10-04 22:19:12 GMT]:
This is by far the best salt to use in your pond.

Pros: keeps my fish healthy

Cons: don't have one

I have used this in the past, but do not use it currently. With the right flora and fawna, I have found it unnecessary.

Pros: Simple to use

Cons: n/a

I do not use this in my pond. The water from the tap. once treated needs no additional chemicals.

Pros: easy to use

Cons: not needed

I found it wans't needed in my pond.

Pros: Easy to use

Cons: un-necessary