Meeples

Hi, my beta is in a 2.5 gallon tank. I do a 50% water change and a 100% water change every week. When I do the 100% change, I also run each artificial plant and her cave, heater under warm tap water, plus the gravel too, and I clean her tank with a splash of vinegar, rinse it 6 or 7 times in the shower. I bought some aquarium salts today, but I'm not sure if I should use them instead of the vinegar or if they need to be rinsed out too. I bought the salts because I thought Jewel had swim bladder. She completely recovered overnight after I removed half her water. Can you give me advice, or point me towards the best person to ask about cleaning her tank?