Honestly, I've done the 'cheap' set up a few years back. It's not worth it. This is one of those hobbies where the more money you spend and the more planning you do the better. You really cant half *** a salt/reef tank.
Ditch all your EQ you have right now, its useless. If you have a 90, expect to spend about $2,500-4,000 just to get it going.
You *need*:
30g Sump
Skimmer
T5 lighting (Get a NEP

)
New Sand
New Live Rock
Plumbing supplies
RODI system
Brute Trash can
Marine Testing supplies
TDS meter
Fragging EQ (if reef)
3x Koralia 3 or 4 pumps (or comperable)
heather
cooling fan
Ranco temp controller
2x Phosban Reactors
PH Meter (trust me its better than testing)
Refractometer
Salt mix (one bucket every 2 months)
Plastic Sleeves
tons of 5 gallon buckets
AND a crap load of little things that im forgetting.
Its not just 'oh im gonna switch over', its 'oh, im going to switch and i need to be prepared to spend $5,000 in the next 6 months on this hobby.'
Plus i literally spend 6 months reading this site every day and asking tons of questions to get a feel for what is what in the reefing hobby.
Good luck man.