What kind of Reverse osmosis better 2 stage or 5 stage

I want get the right one and dont wanna buy the wrong one so if someone can please help me i would appreciate it

You probably don't need either. Is your water chlorinated or particularly bad?

RO filters generally have bad through-put, and are almost always overkill. You can get sediment filters, water dechlorinator, water softeners, ect. Plants don't need perfect water.

The water is really high in ppm so it not the best I'm buying distilled water for now

was about to ask the same question,not a lot of feedback here is there a better thread out there? I was wondering if you are using the 7 stage and re-introducing calcium and magnesium is this better than using epsum salts or Cal-Mag? also does the Mineralizer add sufficient amounts?
Here is the data from the one I am looking at.

o Ca2+ - 34 mg/l
o Mg2+ - 12 mg/l
o Na+ - 22 mg/l
o K+ - 8,5 mg/l
o CO32- - 10 mg/l
o SO42- - 0,3 mg/l
o Cl- - 0,8 mg/l
o F- - 0,06 mg/l

Peace =)