I have what I think is a small problem. I bought my 72 inch coralife aqualight pro used over 6 months ago and never got around to replacing the metal halides til now. When I was trying to slide the glass covers out they would not budge at all. I had to tap them as hard/softly as i could to slide them to replace the bulbs. And unfortunately on sliding my 3rd cover back on. It shattered. So basically I just need some input on what to do. Should I try to find/order another glass cover or would it be alright to leave it exposed.