I have no idea how well/poorly this works but so often people are looking for an overflow solution that does not require a tank to be drilled that I thought I would post the Practical Fish Keeping ad.
http://www.practicalfishkeeping.co....er&utm_medium=email&utm_campaign=April_8_2010
Its a little pricey and the info is for the UK but ...
http://www.practicalfishkeeping.co....er&utm_medium=email&utm_campaign=April_8_2010
Its a little pricey and the info is for the UK but ...