Overflow/Return on a Drilled 110g Acrylic Tank

skystar · 11/29/2012, 01:17 PM

Hi Everyone,

Just got a great deal on a used acrylic tank locally and want to know the best way I can plumb it for an overflow/return. Basically it's 110g (72x20x18), and because it was previously used as a freshwater system, holes have been drilled on the bottom for an under-gravel canister filter system. It has 3 holes on the bottom, 2 of them are situated towards the right, and 1 towards the left. All 3 holes are in the center of the tank. I'd like to try and utilize these holes instead of drilling new holes if possible.

I have a attached a 3D model of the tank and you can see the hole placement.

Whats the best way to set it up? 2 Overflows and 1 return? What type of overflow standpipe should I look into? Thanks!

zeminabr · 02/18/2013, 07:48 PM

I have almost the exact same situation. I have a 150 (72x28x18) that had three holes drilled in the bottom. I am going to seal them up with plugged bulkheads and drill new holes for an external overflow system. To me, that seems to be the best way to do it. Getting a used tank cheap is one step, but that means more effort and labor to make it into the tank you really want. Let me know what you decide, as I would love to bounce ideas off you.

02/18/2013, 07:48 PM	#2
zeminabr Registered Member Join Date: Jan 2013 Location: Tampa, FL Posts: 153	I have almost the exact same situation. I have a 150 (72x28x18) that had three holes drilled in the bottom. I am going to seal them up with plugged bulkheads and drill new holes for an external overflow system. To me, that seems to be the best way to do it. Getting a used tank cheap is one step, but that means more effort and labor to make it into the tank you really want. Let me know what you decide, as I would love to bounce ideas off you.