looks fine mate.
the tricle tower in the sump,
weres the drip plate? normally have the drip plate with a small gap before the media so it has an even spread of water. looks like your just pumping water ontop of the sponges.
also the rays,
i think i should be keeping them for a good 4 to 6 weeks before you put them in your tank. make sure its well cycled and settled before they go near it. i know your in a rush now youve got the tank but honestly the tank needs to be ready.
get some fish chucked in and let it sort its self out. make sure you have a decent amount of fish in there so when you remove them the filters can cope with a pair of rays.