hey pal, nice tank, you are always going to get different opinions and views here, as we all have opinions and you will have to decide your self on most issues, but we all try our best to help, firstly id remove the tray from the top,keep it open, its an issue i have my tank has a hood and im not happy with it, i wish mine would be totally open, better for gas exchange and keeping the ph stable, plus the panel will get messy and you will need to keep cleaning it, a lot of guys do have a top tbh, but i dont like them myself,you will soon work out whether its for you or not.
have you got a sump under the tank?
are you going to get more rock?