I've done a soerity with a 10G. They were all juvies when I added them but they sprouted like weeds when I put them into the 20G. The little butthole in the upper right hand corner turned out to not be a female. All of them are pretty mellow.
And here they are now - all growed up - about a month ago. He flares sometimes but that's about it. If I could get a 40g for them, I would but it wont go over well if my tank crashes through the floor
I cant find any plants locally either. I got most from an online plant shop and some from members here. I'm surprised they are all doing good except the 2 clusters of feathery plants in the front. They all died but the bigger species in the back is doing well. I think that mighe be because I have some 3 inch snails that like to bulldoze through my decor and it uproots them. They then float at the surface where they get more light till I replant them again. I think the extra light helps.