Hi what's your name "dtzy",
Besides ketapang leaves, both Sera and Aquarium Münster has peat pellets that will drive pH down to 4·5, with pretty tannic water as well.
Not sure if these 2 will have high ammonia but if you have tested for it, what results did you get (with the 3 'branded' peat moss) between the 1st and subsequent wettings?
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