What is your pH level now? If the pH is really low, the cycle may have stalled
Oh we have another one of these types.....oh boy
For one, you don't need to talk to people like they are dumb or don't know they are doing. I test my pH and my other parameters and do what I can naturally to accommodate my fish. Most tank bred fish are very adaptable and will thrive in a multitude of different pH levels. Its the acclimatizing process that will make or break the fish. You run a higher risk of messing up your fish throwing in chemicals to meet textbook requirements that you do having a stable pH. Based on your assumptions of us and out knowledge, I am going to assume that because you are out to perfect, that you have a betta in stagnant waters to replicate a rice paddy?