That seems like a lot of occupants for such a small tank! I love my spec but am way too chicken to have that many creatures residing in it. (your set up is beautiful btw - and I love the bonsai!)
Hope you don't mind me asking how often you change the water and how long it's been set up now.
Edit *I suppose I should read fully! You did say it's been set up about a month
I need more coffee!!