since you have a smaller tank, i would maybe suggest reducing the number of schooling species and increasing the number of one species' school? would look a bit less cramped in that tank. i have the ecco 2232 btw. it is a good filter provided there are no air bubbles present in the filter. that took me a while to remove
Well, I would have went oto's instead of shrimp but... i've never had an oto for more than a day. I could change the loaches to a dwarf cory though. I have a group of clowns in my big tank and we love how much they like to play.