Pump Options for 900g per hour?

  • We are currently upgrading MFK. thanks! -neo
No matter what size return piping you go with you're not going to exceed the rating of that pump. The spraybar may have given you some added head which would have slowed the pump down, so removing the spraybar removed the added head.
 
yeah, so I'm getting 960lph with the spray bar removed compared to some 2800lph I should be getting according to teh Eheim's pump chart with that head!!
 
Is there any restriction on the input? How is it plumbed?
 
Pumps are generally designed to push water, not pull water. If a pump is having to pull your water through a long run of pipe, up vertically, or through a lot of fittings then it's going to underperform. You want the pump either right beside the water source or being gravity fed water so it doesnt have to work at pulling it. You want it to push the water.
 
well as it's set up right in the bottom of the sump then surely it will be gravity fed?

Are you saying it should be out of the tank and have a tube connected to it from within the sump acting as a siphon?
 
The pump should be fine in your sump as long as the intake is not restricted in any way by debris clogging the pre-filter and reducing the amount of water available to the suction port on the pump.

Much of the restriction people experience is from the number of 90 degree fittings required to get the outlet of the pump to the aquarium, including the distance the water has to travel and the diameter of the hose, tubing, piping, etc.

Can you post some pics of your setup from the sump to the tank, including hoses, fittings, etc.? It would be very helpful to help us find out where you might be restricting the flow.
 
it basically comes out of the pump in 16mm hose, it then goes up 12" and into the hydor external heater 300w, then through 24" of 16mm hose, 2 90deg angles then straight into water. now getting 1200lph which is roughly 3x turnover rate
 
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