Bloated Seahorse

[rayjay]

No, I've never heard of eggs produced with just two females in the tank but if they are just a recent acquisition then production may have started with male exposure before you got them. If you've had them longer than about 20 days max, then it's not eggs.
You need a prescription to get Diamox so you have to find a vet that will get it for you. (or a sympathetic physician)
If it was internal gas bubble disease the cure rate is pretty good.
However, with fluid retention, success is not very good at all.
Both conditions are caused by water conditions and is normal when housing seahorses in tanks that are too small for them.
Two standard seahorses should be in at least a 29g tank for best chances of success. Each additional two require an additional 15g.
The only way to make it work with lower volumes is to be continually doing major vacuuming of detritus and uneaten food, with frequent large water changes, and it helps to have an oversized skimmer as well.
Dosing probiotics will also aid in keeping nasty bacteria away. (I use Sanolife Mic F)
If you check out the links at the bottom of the page at "My Thoughts......" linked in my signature, you can find out a lot of the basics that you should know for keeping seahorses.