Help with head loss calculator...

[becact]

I used the RC head loss calculator, as I have a mag 7 for my 90g:

http://reefcentral.com/calc/hlc.php...&FlowRate=700&Elbows90=1&Elbows45=2&B1=Submit

Am I reading it right? It says I have 10.5 feet of head loss, so my mag 7 should only by putting out less than 100gph according to this chart (scroll down a little):

http://reefcentral.com/calc/hlc.php...&FlowRate=700&Elbows90=1&Elbows45=2&B1=Submit

I find it hard to believe frictional loss is higher than the head loss sue to height. Did I do something wrong with the calculator?

 

[becact]

OK, after playing with it, no matter what I type in it always gives 6 feet of friction loss. If I input 10 90* elbows and 20 45* elbows on the return line it still gives the same frictional loss as a straight pipe. So it guess it's broken. Anyone have a link to a working calculator for this purpose?