Question: is epsom salt safe for bettas?
Answer: Epsom has a bunch of uses. Not surprisingly, its uses in fish are very similar to its uses in humans. When used properly in fish, it can act as a laxative as well as a means to reduce swelling. ... In Epsom, the betta should stay in for 10-15 minutes, with 10 being less severe need and 15 being a more severe need.