water volume from overflow box

[Doug]

Bryan, the 3MD is the pressure model and fan cooled. My 4MD non pressure model was as Tony says. Cooking hot casing. Thats why I only use the fan cooled now, regardless of noise.

Mitch, your point is a good one. Thats one reason why I was switching my beckett back to a Mag24 from a Mak4, before I sold it.

I do have a pair of 250w heaters running but in my case the wood stove runs pretty well all winter and keeps the tank, my wife and my dogs toasty warm.

My 400w halides also do a good job in the day, but at night with sump, two large 1 1/2in. overflows and an open top 225, it can get pretty cool.