"plaguebeast" wrote in message
...
do you have your mag 7 in your sump under water ? I have mine in a 5
gallon
sump and it seems to get pretty warm and heats the water. Do you know if
it
can be safely run without being submerged in water ?


yes they can, but they still add a good amount of heat to the water. I have
a Mag 12 external and it heats the tank (29 gallon) from 76 up to 82 with
just the pump running closed loop.

kc