I am just saying that was my experience.The main tank has alot of corals...critters..fish,but it also has alot of circulation,a refugium,skimmer, a bunch of LR,etc.The little tank does not...it has only a few corals,no skimmer,no fuge,and only 3 LBS of LR...really,I could'nt even see in the tank,that's how bad it got.It's also a pain to clean, as I can barely get my hand in it.It's a modified eclipse...which for me is also part of the problem,since it is plastic,it does'nt clean up very easily.
I just think in my situation,that a 3 gal tank cannot handle the water from a full blown 75 gal mixed reef.I think he may find out the same...trying to put water from a 280 into a 2 gal.