Does anyone make their own salt capsules?

I’ve been doing straight salt tablets from Amazon, but they seem to be irritating my stomach, even with a full meal now. I recently got some Celtic sea salt to try in my water (I put about 1/8 of a teaspoon in my bottle water this morning) but I could taste the salt once my water wasn’t cold anymore and it made my stomach feel off. I wanted to try to make my own salt capsules, but I didn’t want to end up messing myself up more. Vitassum seems to be okay, but it’s not enough for how pricey it is for how much I need (3000mg per day). I currently only take 2 per day and take my straight salt tablets in the morning and at night. So I was hoping that someone on here could tell me if I can make my own capsules and point me to a good recipe. Thanks!