Start over. Put fresh water in the jug, use a small glass with the salt in it. add a little bit of very hot water and stir, when the dissolving stops add a little more hot water and stir, repeat until it is dissolved. then add the dissolved salt to the jug and stir. Add your water conditioner, check temps and then pour into the container you are giving bath in, unless the main water container is the bath. The match temps and add your betta.