In a 75 you can get by with some soft corals like yellow polyps, some leathers and mushrooms, even zoas. Some LPS as well like torch corals, hammers and candy canes. i would not attempt any clams or SPS corals with that amount of light.
Some people are like slinkies...they serve no real purpose yet can still bring a smile to your face when you push them down the stairs!:p
Have a great day! Brian
I assume there is nothing that i can do to make my lighting system better other than upgrading to a whole new unit. I paid three hundredd dollars for this unit at the lfs, the said it was the best they had. I sure wish i had found AA before i made that purchase. For a relatively small difference i could have got a much better lighting system than what i have now.