What's your pH? Fish adapt to pH so I wouldn't mess with it. Once you start chasing pH levels with chemicals it causes pH swings which will kill your fish. Almond leaves do work and peat moss if you don't mind a brown water tank. The tannins that turns the water brown is also what lowers the pH. Another option is to add 50% tap to 50% RO
or Distilled water. Again, this needs to be done with accuracy or you'll swing the pH. It also lowers your KH
being your buffer which stabilizes your pH so you don't want KH
real low or you get pH swings.
IME, bacteria in a bottle doesn't work. I know some people are dead set on it but I don't see how bacteria lives in a bottle without a food source (ammonia).
Seachem Prime converts ammonia to the safer ammonium and also converts nitrites to a safer form. This has to be dosed every 48 hours to maintain effectiveness. Some people dose every 24 hours. There seems to be some debate between 1 or 2 day effectiveness but Seachem claims 48 hours.
So my advice would be to change 1/3 of your water every 48 hours with Seachem Prime. Test your water just prior to your water change to see what's going on with it. Remember, if you have, say, .50 ppm
ammonia and you change out 50% of the water you will then have .25 ppm
in the tank.
If your readings are high after two days then I'd start a daily water change schedule.