Ran my own little experiment tonight. Put table salt in a 000 gelatin capsule and placed in room temperature water. Got distracted, but when I checked on it after 15 minutes, the capsule was swollen and probably 75% of the salt had escaped and sunk to the bottom. But I see a couple problems with this method, so I'm not longer going to use it. 1. A single capsule really swelled up. I can't imagine having 15 to 20 of those in my gut. I would think all that gelatin might be bad for the absorption rate. 2. Gelatin capsules get quite gooey/sticky when wet. What if they stuck together, and the salt stayed trapped in them until they completely dissolved. 3. I'm going to be under enough stress as it is, and filling all those capsules will add to it. I think I'd rather take that time to do the aquarium test strip test to make sure the SN is good.
I'm not saying capsules won't work , because they obviously have for some people. But it does introduce some possible complications to the plan, so personally, I'm going to stick with mixing the SN in a bit of water.