Okay, Ive got some questions about my 8 gal. nanocube. I got it second hand, and realized that it's 9 inch bulb was somehow 24 watts. I searched the internet for replacement bulbs, but could only find 18 watt ones. the bulb it came with needs to be replaced now, And I hve no alternative to the 18 watt. I want to know if the lower wattage will have any ill effect on the various mushrooms and zoas in the tank, and also if it is still enough wattage for xenia, which I plan to keep. I have also wondered about possibly keeping some basic hard corals, just ecrusting stuff, candy cane, and maybe a hardy brain. I am pretty sure I cant have them, but just want to be sure. Also, If there are any suggestions for something other than mushrooms and zoas that I can keep in the setup, suggestions would be helpful. thanks!