Hi all. I've been doing some reading about tannins lately, and after seeing photos of silver dollars kept in tannin stained water, I'm hooked on the idea for my SA community tank. Only problem is that when I try to find information about keeping tannins in the water, all I can find is stuff telling me how to remove it. Now for my questions: 
1. I've read that almond leaves can be used? Where would I buy these, and do they have to be somewhat dried out, or "fresh"? I don't have an almond tree near by that I can just pick leaves off.
2. Roughly how many weekly 50% water changes will it take before the tannins get diluted from, say, a dark tea colour to slightly yellowish? I know this will vary a lot, so I'm just looking for peoples experiences.
3. Is there anything other than almond leaves and driftwood that produce tannins that could be used? I don't want to use driftwood because I'm worried that my SD's will hurt themselves on it.
Also, I've just finished paying for a decent size 'chunk' of driftwood for my bettas tank that I'm about to start soaking, if it's still leaking heaps of tannins when I put it in the tank, will it bother any of the tanks residents? Will it benefit any of the tanks residents? Tank houses: x1 male betta, x1usd cat, x2 kuhlli loaches and 5 white cloud minnows.
Thanks in advance for any help.
1. I've read that almond leaves can be used? Where would I buy these, and do they have to be somewhat dried out, or "fresh"? I don't have an almond tree near by that I can just pick leaves off.
2. Roughly how many weekly 50% water changes will it take before the tannins get diluted from, say, a dark tea colour to slightly yellowish? I know this will vary a lot, so I'm just looking for peoples experiences.
3. Is there anything other than almond leaves and driftwood that produce tannins that could be used? I don't want to use driftwood because I'm worried that my SD's will hurt themselves on it.
Also, I've just finished paying for a decent size 'chunk' of driftwood for my bettas tank that I'm about to start soaking, if it's still leaking heaps of tannins when I put it in the tank, will it bother any of the tanks residents? Will it benefit any of the tanks residents? Tank houses: x1 male betta, x1usd cat, x2 kuhlli loaches and 5 white cloud minnows.
Thanks in advance for any help.