Aquarium and Pond Pump/Filter Head Pressure

[Carl]

I have updated this article once more.
This includes a complete layout change, as well as further simplified information for determining head pressure of a filter or pump an aquarium or pond keeper might choose

www.aquarium-pond-answers.com/2011/09/head-pressure-in-aquarium-and-pond.html

Carl

[Carl]

I have updated the "Aquarium Answers" Head Pressure article.

Here is a snip from the article:
"It's noteworthy that you can increase or decrease the head pressure by the placement of the pump/canister filter and other equipment run off the filter. Keeping the tubing length to a minimum can help decrease head pressure as well as to not use under sized inside dimension tubing.
Impeller, intake, internal flow, and exhaust design will also play a role, as I have seen one canister filter brand barely affected by placement, whereas another is much more affected by filter placement.

Here is an actual test using the Filstar S and timing its flow to fill a container.
Level with the aquarium - 164.53 gph
24" below the aquarium - 153.00 gph
52" below the aquarium - 142.87 gph"

Reference:
www.aquarium-pond-answers.com/2011/09/head-pressure-in-aquarium-and-pond.html

Carl

[Carl]

I have once more updated the "Aquarium/Pond Answers" article about aquarium/pond filter/pump head pressure

Here is a snip from the article:
"Aquarium Filter Siphon DynamicsWhat adds to the confusion canister filter flow rates is the subject of open system versus closed system,
A pump in a sump is an open system, where as a motor/pump as part of a canister filter is a closed system by virtue of the aid of a siphon. This Siphon aid also applies if we were to use a water pump placed in the aquarium to power the canister filter, which I have often done when the motor has failed (this is less expensive than a new filter and often makes for an easier starting filter).
This siphon aid results in much lower affects of distance upon water flow rate between a canister filter and a pump in an open sump.

What is noteworthy is that despite this siphon aid, tests and 1000s of practical use applications show that there is still a drop in flow rate for a closed system canister filter due to friction, tubing size, devices such as UV Sterilizers, CO2 equipment, etc. along with some impact from head pressure.
"

Reference:
www.aquarium-pond-answers.com/2011/09/head-pressure-in-aquarium-and-pond.html

Carl