You don't need any meds to speed up his bowel movements thats for sure. My bp only goes once a month or so, they are all different. Just because one bp goes weekly, does not mean yours should. You don't need to soak him, but if you are concerned about him not going to the bathroom, a little bit of warm water (aroud 88 degrees) will prompt a poo heh. If you do this, just don't fill the water too much, fill it to about half way up his sides, maybe a bit more. If he swims a bit, he will likely go to the bathroomlike I said though, this is not neccesary, he should go when he needs to.