In a 20 gal I think it would be cool to fill the tank about 1/3 of the way and have a lot of plants that grow up to about the top of the tank rim and hang out over the water.
I love what the IAL does for the water and it really seems to perk my boys up. I tried a couple of the bottled products before I broke down and ordered the leaves off Aquabid, and the results just weren't the same at all.I was also recommended/reading about Indian almond leaves, I am definitely going to order some. I don't plan on breeding, though. We might one day when we have the space/time for it but I stick to focusing on frogs for now.
I'm excited about this biotope!