Hi Crookster
Please do not use salt in tanks with corys. It is not a myth at all.
Catfish and loaches absorb the salt through their skin and it remains in their systems. It might not kill them immediately, but it will result in kidney failure or liver damage in the long run.
If you keep your aquarium in good chemical balance and do frequent water changes and gravel vacuumings, your tank will be healthy and there is no need for "tonics," antibacterials such as MelaFix, or salt.
Please do not use salt in tanks with corys. It is not a myth at all.

Catfish and loaches absorb the salt through their skin and it remains in their systems. It might not kill them immediately, but it will result in kidney failure or liver damage in the long run.
If you keep your aquarium in good chemical balance and do frequent water changes and gravel vacuumings, your tank will be healthy and there is no need for "tonics," antibacterials such as MelaFix, or salt.