Originally Posted by melosu58
Only thing with the overflow is you`ll need to make sure the overflow does not run out of water or it will over heat and melt the overflow. Maybe even catch on fire. I would do it in the sump where your return pump is.
With some heaters this would be a very good point, but alot of heaters now come with water level sensors that automatically shut off the heater should the water level drop too far (like my aqueon pro 250) so if you your heaters have this option, that's not a concern. Even if they don't have the auto-shutoff it really woukdn bother me..I personally check my tank atleast once a day, if tore the same way you'll be ok