Looking over Amano's Nature Aquarium books this weekend, I noticed that he often likes to pair Riccia and E. parvula as foreground accents. It made me wonder whether there are general guides for such types of pairings to achieve the most best results. What accent plants would go well with a nice low carpet of HC, glosso, microswords etc. ? Would you want to use midground plants with a same or different leaf shape or color shade than your foreground carpet? I will inquire to see if my LFS has an aquatic plant sommlier )!