Okay I hear from a lot of people that they use Almond Leafs as a source of tannins which is beneficial to their fish.
My question is can you provide a beneficial source of tannins from other products?
When I hear "tannins" I think of tea but I'm pretty sure if I added tea to a fish tank that the caffeine alone would royally mess with the inhabitants' wellbeing (and not in a good way). Even if I used high quality white tea that doesn't go through ridiculous amounts of processing that regular black/tea-bag tea does, I'm assuming that would be bad.
Does anyone know of other ways to give them what (or at least some of what) an almond leaf does?
I've heard of Black Water Extract but I don't know enough about it to feel comfortable using it.