chrismunn
New member
we've got an episode of HOUSE going on in here with all these heater theories! very interesting theory, and quite possible at that.
you said you've got a mag 12 or so for your return pump right? ans thats pushing what, 8' 10" of head from the basement to the display upstairs?
after head loss on a mag12 at 8' you end up with 540gph for a turnover rate of 6x per hour..... thats only calculating the 90g display without the sump or fuge. add thoes 2 tanks to the equation and it lowers the turnover rate a small amount.
whats the average turnover people try to acvhieve? its like 10x tank volume per hour right? this doesnt include PH's because they contribute to flow in the tank, and not flow through the overall system. therefore they are irrelivant to the equation. so if 10x/hr is the going rate, and your only achieving 6x/hr, it does lend favor to the "heaters being too close" theory...
but, i think for the "heaters too close" theory, the sump would have to be pretty big, or at least wide, for the water passing through to be going slow enough to have a measurable affect of lingering heat. even with a low turnover rate. this is unless the heaters are mounted in the corners of the sump tank where an eddy created by the drain to the sump could be holding the heated water in a pocket where the heaters are located....
rt6, try putting your heaters in the middle of the sump, and in a HIGH FLOW ZONE. if the heaters were cancelling themselves out, putting them in an area of the sump where as much water as possible can pass over them without obstruction, should solve, or come close to solving any problems with heated water lingering in one chamber and turning off the heaters before the rest of the tank heats up.....
you said you've got a mag 12 or so for your return pump right? ans thats pushing what, 8' 10" of head from the basement to the display upstairs?
after head loss on a mag12 at 8' you end up with 540gph for a turnover rate of 6x per hour..... thats only calculating the 90g display without the sump or fuge. add thoes 2 tanks to the equation and it lowers the turnover rate a small amount.
whats the average turnover people try to acvhieve? its like 10x tank volume per hour right? this doesnt include PH's because they contribute to flow in the tank, and not flow through the overall system. therefore they are irrelivant to the equation. so if 10x/hr is the going rate, and your only achieving 6x/hr, it does lend favor to the "heaters being too close" theory...
but, i think for the "heaters too close" theory, the sump would have to be pretty big, or at least wide, for the water passing through to be going slow enough to have a measurable affect of lingering heat. even with a low turnover rate. this is unless the heaters are mounted in the corners of the sump tank where an eddy created by the drain to the sump could be holding the heated water in a pocket where the heaters are located....
rt6, try putting your heaters in the middle of the sump, and in a HIGH FLOW ZONE. if the heaters were cancelling themselves out, putting them in an area of the sump where as much water as possible can pass over them without obstruction, should solve, or come close to solving any problems with heated water lingering in one chamber and turning off the heaters before the rest of the tank heats up.....
