I got a reply from Finnex today in regards to how easily the glass scratched. Once I was able to decipher the grammar/spelling, the jest of it was - "sorry, we use tempered glass and it scratches easy. We recomend using cleaners designed for acrylic." That's it! I even went back through the manual (if you can call it that) to see if there were any warnings or recomendations for cleaning and there was nothing. I'm done with it, I am so disgusted. I went through heck with the break down of the 90g which I still regret and lost several precious to me frags and found a little happiness in this tank. I thought $700 for an all-in-one was going to be worth while and easy. WRONG! So far the only quality thing I have invested in the tank is my fish, corals, and the upgraded parts I put on it. I'm done.