RO/DI Questions

[camg]

I am looking into buying a RO/DI unit and have a few questions...

What is the difference in a 3 and 4 stage unit?

Where is the best place to buy?

Which is the best to buy for less than 150$

What else do I need besides just the unit?

 

[zdaytonaroadster]

http://www.bulkreefsupply.com/RO/DI-Filters-&-Systems-RO/DI-Systems/c9_10/p603/Economy-4-stage-RO/DI-unit/product_info.html">http://www.bulkreefsupply.com/RO/DI-Filters-&-Systems-RO/DI-Systems/c9_10/p603/Economy-4-stage-RO/DI-unit/product_info.html</a>

i love mine