hardware failure

Hello, I have a tank of 50 gal. 98Lx45Wx45B in cm. I have 2 slabs of glass on each side, on the 98 cm glass. Is it okay to remove it? As I'm planning on mounting hanging kit for lighting soon. The tank came with the glass slabs, I bought 2nd hand, years ago. Cant find original owner to ask...

Hi I recently got a 75g tank and filled it with fresh water to see if its all running and if there's any leak. However when I tested the skimmer (jad wg 520) some Chinese brand, there was no bubbles (I even removed the airline adjuster to make sure there isn't anything blocking it) what would...