Recently purchased an over flow during the Marine Depot closing sale. Finally was able to get around to the task of drilling and installing it on my 15 gallon nano that's been up and running for over two years. Couldn't get the drill behind the tank with the available room so went to Harbor freight and purchased the 90 degree angle drill attachment. Drilled two holes. One for the overflow and one for return. Took around ten minutes per hole. Worked great.
Next, clean up the HOB overflow and list it for sale.
Next, clean up the HOB overflow and list it for sale.
