I really want to start up a successful saltwater tank and i have a few questions, ive heard that i should not go smaller than a 50 gallon tank due to ease but i have what i think is a 30 gal, would this be that much harder to maintain? i would like to use this if possible since i already have it. i already have a marineland penguin biowheel 150 B filter, if the 30 gallon would not be much harder to maintain what would be a good secondary filter? (someone suggested a skilter 400) also if i am interested in reef down the road, what would be a good light to support fish and coral? i am in definite need for some professional advice as to what to do and would greatly appreciate any help. thanks