Eashton123
Member
I thought about this same thing for my future tank. In my opinion the x15 is an excellent product, but the decision all comes down to the types of coral you will be housing in your tank. Do you want to be limited by your light? Is really all you need to consider when it comes down to choosing between the two. Also something to think about some day will you want to move up in tank size? If you do than the x30 would probably be best.