I have a jpouch so am familiar w cronic D. I suggest "binding" foods - corn chips are a good one for me, as is rice. I follow the Low FODMAPS diet which is similar in suggesting you limit sugars. Most sugars make me really sick feeling and give me the runs to the bathroom, as can wheat (sugar). Not sure why rice doesn't do it, as I know that also is broken into sugars. Low residue diets also help. I find smart water or decaf green tea (hot or iced) is better for me than sugary electrolyte drinks and sometimes I get too much gurgling with straight water.
I also have tried psyllium husk which helped (there's biscuits as well as drink supplement), but I've also had the opposite problem where I did too much and then all of a sudden I was constipated!
Hope you find a good balance!