tank bottom change

i have a 75gal tank and it has a tempered bottom. i want to change the bottom so i can drill it. can i use plexy and haw thick does it need to be. or does it have to be reg glass and how thick does it have to be?

 

I'd just go to Petco and get their $1 dollar a gallon sale. Unless you remove the bottom and get new glass and resilicone it, might be cheaper.

 

does the glass need to be thicker then the side glass. how thick does it need to be?

 

if i change the glass from temp to reg glass i can drill how thick will the glass need to be? on a 75 gal tank.

 

Your trying to drill it for an overflow right? Why not do a beananimal drain with a coast to coast overflow. Then you only have to drill the back. I imagine its pretty hard to change out the bottom of the tank, and not be concirned with it holding. I wouldnt take a chance with changing glass out. Just a thought.
Matt

 

I've never heard of drilling the bottom to do a DIY overflow. I'd agree, go with a bean or what i use Complete Overflow Kits - Glass-Holes.com dope aquarium stuff

Also, BTW the pectoral $1 per gallon sale only foes to 55g not 75 usually. Sometimes only 40.

 

i:ve looked atthe overflow kits but thier is a sticker on the bottom of the tank and it says DO NOT DRILL TEMPERED GLASS and i dont know if that goes for the bottom or every peace of glass the tank is made of.

 

The sticker should specify whether it is just the bottom, or the whole tank. I have one tank that says "Bottom glass is tempered, do not drill" and another that says "All glass is tempered, do not attempt to drill".

 

so if it says the bottom then it is just the bottom not the sides.

 

Yes. Although, to be safe see this link to confirm the sides are not:

How to tell if glass is tempered.