You did say Reef, an open budget is a MUST cause your equipment - all of it - gotta go.
In tank 1st -2x Koralia hydor powerheads rated @ 500gph for softies or up to 1,000 gph for SPS. the pumps you have are cheap overratted and within a year will become very noisey and useless. I'd do 2 inch min. sterile sea sand or dry agronite + 50lbs of rock live and dry.
Sump - lose the bioballs - infact lose the whole sump and get a 29/30 gal long glass tank. That sumps got difficult and nitrate/PO4 generator written all over it. Lose the lil' skimmer - get a berlin cyclone type rated for 100gal w/ a 500 to 750 gph pump. I see baffles in the DT so I'm guessin' your drilled - 1,000 to 1,400 gph Pondmaster mag drive can do the main circulation job. You'll need 2-3 filter socks for the return tube, 2-3 socks so you can swap them out easily weekly without the pressure of having to rinse them out immediately. 2x small reactor tubes one for GFO/PO4 Resin, the other for carbon - 1 cup in each tube. A 100 gph pump to run both in tandem. Carbon runs no more than 48 hrs a week then dose trace and replaced every 4 weeks. PO4 resin replaced when PO4 is higher than .02. You'll need a baffle with a block filter to protect the main drive. Buy several same as socks. Inlet shut off valve - go manual the checkballs get stuck from Cal, sodium, + mag build up. Also some type of overflow or power outtages.
Heater - get one that has an indicator light and this can go in the sump or DT not the baffles.It needs to heat a large volume of water not small.
Lights - 4-6 bulb T5HO or LED's rated for SPS + Clams (200-250 watts). Metal Halides are good too but might cook the water so the water will need to be cooled via a chiller. PC's can grow mushrooms and gorganians thats about it - Wrong PAR's for most LPS + SPS.Get a good timer, stability and consistance is needed with hard corals.
W/C's and top offs - RO/DI unit 60 to 100 gal per day, portable TDS moniter, and a refractor. Hydrometers are very inaccurate, not good when Sodium,PH,Calcium, alk, and Mag need to be within a specific range. It's all relavent - if ones off their all off. W/C tank with heater + the powerheads you all ready have. Takes approx. 24 hrs for heat, Ph , and salinty to stabilize - it's all relavent.
Salt - IO Reef crystals are good - becareful not to buy the saltmixes rated for sps and clams til' you actually have them growing. It can create an enviorment thats too elemental and mineral rich for your corals. Alk 8-10, Cal 450-500, Mag 1,200. Slow drip acclimate everything Live going into the DT.
Test kits - get good ones like salifert or red sea. Tests for Ammonia, Nitrate, Nitrite, Phosphates, PH, calcium, magnesium, and Alkalinity. Iodine if you get shrimp or ornimental crabs and lobsters.
A quarentine tank is very nice to have - can stop fish disease from entering the DT. Dip all corals with Reef RX before entering the DT.
Most of all - GO SLOW! 1st fish after ammonia + nitrate are zero and nitrite 20 ppm or lower. 6 mo. 1st anemone + softies, 1 yr 1st hard corals. I know this seems like a very long time but you'll get out of it what your willing to wait for.
I'm sure thers more but hat's all for now - hope this helps.