b-diddy thanks for the compliments!!
As for space were you saying 36 inch clearence top to bottom or side to side? If you have 36 top to bottom that's lots of room for a 33g to go underneath and a euroreef rs 135 is more than the tank could ever put out meaning that you could over skim abit but hey look at it this way... Bigger is better if you upgrade say to a 90 or even 120 it can take it ofcourse the 120g being lightly stocked!
For building the sump any joe can do it what you have to figure out is the max space for the skimmer and the return pump then the next is geting glass cut and then sillycone, done like dinner here's a pic of the euroreef rs 135 under my 90g same foot print as your 50 just alittle wider.
Sumps are the way to go IMO cause you can have heaters, skimmers hidden underneath which opens up some space for your display also the return pump can act as extra flow in your tank and if you want to get fancy you could have sand and macro growing in the middle compartment, some turn it into a full refuge with seahorses and other cool things the opportunities are enless I have put feather dusters, frags, pistol shrimp and gobies in mine it's like 2 displays in one!
