How I drilled my 20gal tank, fully setup with fish already in it. v2 with pictures

thomor25

New member
How I drilled my 20gal tank, fully setup with fish already in it.

Please note I have created a copy of the old thread due to not being able to edit the old one and inserting the pictures back into it. The old thread is here http://reefcentral.com/forums/showthread.php?s=&threadid=234382 please ask all questions if they haven't been answered in this one since it does have teh pictures and the other one doesn't.

Materials required are:
Dremmel of some brand
2 dremmel bits #7134 and #7103
paper towel or tissues
scotch tape
a spray bottle with the pump handles like some bathroom cleaning stuff comes with(but buy one that is clean don't use an empty cleaning bottle)
sharpie marker
and the bulkhead you are using (I used a 1" bulkhead)

Additional notes:
You might have to buy a new collet for your dremmel to fit the small shaft of the drill pieces but I just wrapped scotch tape around the end of it till it was tight in the dremmel tool.


How I did it:

I first got everything I'd need together in one spot.
DCP02004.JPG



Take the gasket from the bulkhead and trace the inside circle onto the glass. then take the round tipped bit and start in the middle and move the dremmel around like you are making a tiny circle, this will help incase the dremmel bend. If you bend the dremmel since the hole is bigger then the bit you won't crack the glass.
DCP02005.JPG



Keep going till you go all the way through making sure you spay water on the bit with the spray bottle.
DCP02006.JPG



Once the hole has been made switch to the tapered dremmel bit. Start in the hole and work upwards pushing and pulling the dremmel in and out of the hole moving it about 1/4 an inch in each direction but make sure you spay it with water. After getting to the top of the circle you made with the sharpie use the marker as a guide and cut through the marker with the drill bit. Make sure you tape some tissue or paper towel to catch the water that is running down the side of the tank from cooling the bit down.
DCP02004.JPG



Keep working your way around the tank.
DCP02008.JPG



When you get to the top be careful and don't push as hard, do it slowly and just apply as little pressure as possible and it will pop out.
DCP02011.JPG



Bulkhead installed
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And my fish tank finished.
http://www.ratemytank.org/?i=8
 
The only thing about drilling with a full tank is the noise and stress on the fish. Tapping the glass is not that great imagine drilling. I drilled mine roughly the same way two 1 1/2 in bulkheads and a 3/4 in one as well. The drimal worked great.
 
dufferdan said:
What speed do you run the dremel at? My dremel has speeds from 2 - 10?

faster is better, as long as you cool the bit down with water it will be fine, if you don't cool it you will crack the tank.
 
Like I said in the other one, what is glass made of? also it isn't shavings it ends up being powder, if you are concerned with the glass getting into the tank you can put a piece of duct tape on the inside and it will prevent it.
 
Never mind. Went and got meself a german counterpart of Dremel with some diamond bits. Tried on a sample glas and it went pretty smooth. Wish me luck when I go do the main tank. :crossedfingers: :)
 
During many searches I never saw anything on drilling large tanks with thick glass. I just started drilling my 125 with 3/8" glass today, and it is going smooth. Just takes a bit longer. I used the 2 pack of bits you buy at sears. It was $6.99 for 2 bits and they work great.

I am drilling 4 holes. I will post my time to complete once finish for a reference.
 
Some knuckelhead (me) ordered too small holes to be drilled:
p1.jpg

In action:
p2.jpg

Presto!
p3.jpg


Glass is 10mm.
I used only 7106 bit, but will go and buy 7134. It's a must. It took me 2 and a half hours. Bulkhead is 40mm.
 
Finished drilling the 125 with 3/8" glass today. I have 2 1.5" and 2 3/4" bulkheads. Took about 3 hours with the 2 sears bits for $6.99. Very easy to do and saved me some money for something I did in my spare time doing a little bit each night.
 
Thank you so much Thomor25!!!

I finally got up the stones to try this out. I just drilled two perfect holes in a 10g (for practice) using a variation of your technique.

On the second hole, I was even deliberately ham-fisted to see how much I could get away with. Your technique is very forgiving.

I drilled the tank empty (as I will my display tank) and on its side. I taped a shallow plastic container firmly to the inside (under the hole template) to catch the coolant (water) as soon as the bit broke through. Using a putty "water dam" on the outside, and this shallow container on the inside, I was able to keep the Craftsman bits completely submerged throughout the 6 minutes per hole ordeal.

Thanks so much, the money saved (@$75) will go towards the new sump and making my fish happier. They thank you as well.

Oh, is it me, or is this common?
"I maintain the tank. I feed the animals. I clean the tank. I replace the lights. But suddenly, when I want to poke holes in it, the tank becomes HERS."
 
yes very much so lol, my gf didn't want a tank up at school and I setup a nano and she said she didn't want one, now when I tell her that its mine and to bring it home over winter break she doesn't want to give it up.
 
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