Oh no it's perfectly fine..I'm not really as experienced as I'd like to be... I've kept many amphibians.. but only 3 darts total... and you are right the middle plant is too big.. in fact I'm thinking about redesigning the entire set up. Maybe puting Calathea Corona in there? maybe Ficus pumila? I was also thinking Monochaetum sp. Ecuador or Selaginella uncinata? Maybe you could give me some pointers on good plants for my size of tank?