What do you guys think about closed loop? One LRS is urging me to do it another says that drilling holes in your tank is a bad idea. Give me some advise on this please I'm so confused. My tank will be 36X330. The LRS that says don't do is afraid of the glass cracking where it has been drilled. URGGG I'm not good at this kind of stuff I still can't figure out how to set this tank up.