Rats! I’m terribly sorry to hear that your female did not make it despite all your careful ministrations — all my condolences on your loss, sir. It sounds like you did a wonderful job of clearing up the snout rot and it’s a shame that she wasn’t eating normally while in the hospital tank and finally succumbed just at the point when her snout had finally healed up and she was ready to be returned to the main tank. One of the things that make snout rot so difficult to deal with is that the condition often puts seahorses off their feed or disrupts their suctorial feeding mechanism so that they are unable to feed normally.
You are very welcome to any and all information that I can provide to help keep your seahorses happy and healthy, Jeff. I just regret that the information I provided didn’t lead to a better outcome in your case, sir.