Problems(Streak Of Bad Luck)

I got my Hang on the Tank Refugium yesterday,installed it on my sump.Had small leak so i decided to tighten fitting,not a good idea broke fitting.So off i go to local hardware store to find some plumbing to fix it.Well i had to enlarge the hole a bit got that all done siloned it all up cleaned it up.Come back couple hours later to look at it and it had small cracks around corners and topp.Kinda weird not sure why?I did use alcohol to clean off excess silicone.Just dont want to take a chance with it busting,appears to be sturdy though.Got any suggestions other than through it in the garbage,take a $135 hit

 

What kind was it? All the ones I've seen are made out of thick acrylic.

 

CPR Aqua Acrylic

 

I just bought a CPR and I had to make one of the holes bigger too. What did you use to do that? I have only had mine running enough to see if it worked but there were no leaks, or small cracks anywhere.