New tank questions.

[Eld4nte]

I just bought a used 50g tank off of kijiji. It has a hole capable of fitting a 1/2 inch pvc. I want 2 3/4 pipes for my return and overflow. Is it relatively safe to drill over the old hole or should I plug it with a closed bulkhead and drill 2 new ones? Also the trim on the top is seemingly lose, does it add a lot of strength? If I could get away with it I'd like to make it rimless on the top! Thank you, this will be my first reef tank so expect lots of questions over the next few months. I appreciate the support.

 

[zesty]

Here's a bump for you.

I'm not sure about drilling new holes where the old ones were. Maybe someone with some more glass cutting experience will pop in!

 

[Eld4nte]

I ended up just playing it safe and drilling 2 new holes. I still am unsure about the trim though...

 

[heathd.hd]

I think I would pop it off clean it up and silicone it back down. Not all braces are necessary but it's kinda up to you. Would depend on size of tank and glass thickness also the strength of the silicone on the tank. Age can play a factor with silicone.