Do you use have a baster?
I have an idea how you can speed it up. I use transfer pipet which looks like mini baster, but these are typically used in laboratories for experiments. I have a couple dozen of these I use this for removing the yuckies.
If you do that with a turkey baster, and deposit it directly into the filter chamber, that will help boost your ammonia NATURALLY.
I'm not sure if adding fish flakes to the filter would do the same.
Anyone reading this know the answer?
Wasn't planning to get another betta, but they were nice enough to swap out the blue with clear water so can see the actual colors & I decided to get the little one.
After she calmed down, she displayed purple scales but the camera wouldn't pick up that color. Overall her coloration reminds me of rainbow sherbet.