I'm wanting to add some iodine to my fish medicine cabinet, but when I went to the store to buy it I was a little unsure about what type to get. The one that I was looking at was in a little bottle and was called "Iodine Tincture". It had a little poison skull and crossbones on it and that scared me.
Are there any ingredients I should watch out for or any specific brands that you guys have preferred? Also, is there anything that I have to worry about if I'm using it in an unfiltered environment?(like a betta tank) Thanks!!