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The reason im getting a mag 7 is for a few reasons... first thing being head hight second is Im adding a few inline things.. UV,Heater, Flow meter plus using swing valve, shut off... ect
Head Height (in feet) Gallons per Hour
0' 640
1' 530
3' 460...
If the red comes off easy its red slim if it don't it's not... best thing to do is next water change is fill a 5gl with the old water place the rock in the 5gl and give it a light brush with a new nylon brush
A Danner Mag-Drive 5? If i use that with the set up (Hight,90's, valves, ect...) the flow rate and head loss will be...Total losses are 5.22 feet of head pressure, or 2.25 PSI. with a flow rate of 234 GPH. Does that sound about right? ???