Nope, given the apparent lack of reliability of surgery as per Dr. Hain (although my ENT claims he has 75% success rate) and the apparently high likelihood of spontaneous healing I’ve left it and it has very slowly improved (but is still leaking, if much less). I think the Hydrops is more worrying than the fistula itself, although that’s supposed to die down months after you’ve healed the fistula? I suspect the Hydrops may extend the life of a fistula and this is probably a big contribution to symptoms especially vertigo.
Have you tried the magnesium glycerinate? I tried that instead of just magnesium by itself and it definitely fixed my gut issues 
Kelsey, I believe they are all Magnesium compounds/salts. What I tried was Magnesium Citrate. I’ll try Glicerate thank you for the tip.