Ok, I wish you had talked to us FIRST before trying that but oh well lesson learned. I would have told you NOT to attempt it.
If you want to go with acrylic, it must be cell cast. Call ACI Plastics and get a quote, then call Nationwide plastics and have them beat that quote, then call Laird plastics and have them match that quote. Order your acrylic from Laird.
I think you should still go with glass though. Acrylic doesn't really make sense until you're around 1" or more. At that point glass is just too dang heavy and expensive.
DO NOT put any silicone on the inside of the tank this time. Put it on the frame and on the front of the glass, but don't let it squish out to the inside of the tank.
You can rough up the glass with emory cloth, but I don't think it is necessary if you allow the PC to properly cure before filling.
DO NOT put sand in the tank again before test filling it.
DO NOT try to pry the glass loose again
Just razzing you bro. I've done way more costly f*** ups.