I'm wondering if I can hear several opinions on table salt vs aquarium salt as a treatment for freshwater fish. I know that it is for preventing infection and helping wounds heal cleanly and a little more quickly, not as actual medication for anything. I'm wondering more about the differences between them.
I've heard strong opinions for both sides - that aquarium salt and table salt are both safe to use, and that table salt is absolutely not OK to use and is very different from aquarium salt. To be honest, I'm not sure what aquarium salt is that's so different from table salt.
I'm hoping to hear from both sides. If you have a strong opinion, please let me know why you feel that way and give me some factual information to back up your theory. Don't just tell me "table salt has iodnine," but explain to me why iodine is bad and what the effect will be, etc. If regular NaCl is OK to use, please tell me why the iodine doesn't matter, or anything else that may be added to table salt that isn't in aquarium salt.
No looking to start a fight or anything, just trying to gather information to be better informed about this issue.
(BTW - I have 2 female bettas in a divided 5 gallon at work and discovered this morning that one had found a way through the divider and they'd been fighting all weekend. Fins are shredded, so I will be isolating both of them into smaller bowls and treating with salt for a day or two - this is what lead me to this question).