Internal Filter Above Or Below Water Line

Mumble62

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I have had tanks for a number of years but recently I saw a friend who has set up a tank..she was told to put her Internal filter above the water line..eg the motor /spray bar part.. so that only the media part is under the water..I must admit I have never been told or heard of this..surley the motor will over heat n burn out..anyone please?
 

david1978

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As far as I know an internal needs to be kept underwater to cool the motor. Cut down on spray and splashing too.
 
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Mumble62

Mumble62

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That's what I assumed to..but she is adamant she is right..oh well she will be replacing her filter a few times then
lol
 

aussieJJDude

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It does depend on the filter itself. Some are fine to be kept a little above the water line, especially filters for turtle tanks.
 

Islandvic

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It depends on where the impeller assembly is located and how the water is drawn into it, in relation to the water line.

If the internal filter is flowing water while above the water line, it must be fine.

Maybe it was recommend the spray bar could be elevated, so the agitation on the surface of the water from the streams will increase the gas exchange of o2/co2.
 

Skavatar

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do you know which brand and model your friend has?

I have the Fluval U3 and Tetra 20i. both of them have the impeller/motor at the bottom. and if they were above the water line, it wouldn't be able to suck up the water.
 
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Mumble62

Mumble62

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No idea what make it is but the top part has the impeller
 

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