to ReefSanctuary, a real Sanctuary of reef forums, with lots of very nice members
Hi kelvin,
You absolutely can run your RSM 130D stock - have great success & a beautiful reef tank I did for over 2 years - see my tank thread & pics - in fact I loved it so much I bought a RSM 250 so I could have more fish & corals.
Having said that and to answer your question as to why... imo - because it's a hobby & things like adding a Vortech for addition flow or a sump for addition water or a nicer skimmer only make ones tank better & because what $$$ one spends on a hobby they enjoy is relative... have you sen the new RSM S series
lovely tanks like the RSM 175 gallon 650