Epsom salt (not Aquarium salt) is not stressful, in fact it can be quite soothing to a bloated fish. However, I do agree that it's probably not a good idea to combine it with tetracycline. Peas should be your absolute last resort, as in the fish is going to die and you've tried everything else already. If he's bloated, fasting is the best thing for him. If he's constipated, holding up a mirror and letting him flair for a bit will usually take care of the problem. Peas are way too rough on their delicate digestive systems, bettas are not meant to digest plant matter. As far as how often they should poop, mine poop maybe once or twice daily. If you must feed him something to get rid of his bloat, frozen or live daphia would be your best route.
*edit* if he has an internal infection, epsom salt would be highly beneficial for him, it helps draw the infection out. If tetracycline is all you have, and he's responding well to it, then continue with it, but it has been overused in medicating fish so it is not as effective at treating infections as it used to be. If you can get it, API General Cure, API Erythromycin, or a combo of Maracyn 1 and 2 plus 1 to 2 teaspoons of epsom salt per gallon would be a good treatment for him. These meds are safe to use with epsom.
Last edited by Indyfishy; 11-26-2011 at 12:55 AM.