If digestion is the root cause, then epsom salt or shelled peas may be recommended as laxatives.
However, bloating / clogging can occur for other reasons, such as dietary imbalance, bacterial or parasitic infestation, or stress from one of the many usual sources, such as bad water, wrong water (e.g. too soft, or too warm), insufficient DO (sturgeon are particular sensitive to this one), wrong tank mates, tank, lighting, etc.
If you have a pattern of sicknesses and deaths that you cannot figure out, a professional vet help can be recommended.