Best way to lower pH naturally?

[Nicki Gaga]

Besides RO water cuz I can't find it anywhere

I want to lower my pH to 6.something to breed my tetras. I've added bogwood and peat moss to my tank but it didn't really do anything. I mean, I can't see the water turning brown and the pH dropping...

Do you think almond leaves will do the trick?

 

[Mebbid]

You can try distilled and follow that with blackwater extract.