Well all I can say let this be a warning to anyone thinking of doing this.
I did this on my 240g a few days ago let the epoxy and sand mix dry the required time 4 days. I vacuumed all the left over sand out of the tank.
I filled the tank with around 80 gallons of tap water to get the dust out.
I started to hear loud cracks coming from the tank for over an hour. I thought it was just the epoxy from the cold tap water.
Well about an hour later I look over the tank and see water leaking off the stand.
Well the whole bottom glass cracked from the epoxy sand mix:mad2:
I think if you are going to do this use something on the bottom of the glass so the epoxy does not crack and take the glass with it.
So I now have a 240g tank that is garbage
I was able to get the water out quick with a big 6.5Hp 18g Shop Vac so I had no water damage to my floor in my living room.
I hope my home insurance will cover the tank. I did have insurance on it.
Let this be a warning to anyone thinking of doing this. I posted this so hopefully no one else has this happened.