Filter Media in UG system?

Paul_MTS

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I have a 10 gallon tank with fry in from the pond with a undergravel system pumping!!

For a while I'ved been putting course chopped up foam in the bit between the uptube and powerhead to filter the water a bit.

It does it's job but can considerably slow the flow.

Should I keep it in there or change to something else?or take it out altogether?

As I'll be putting some hillstream loaches in soon I want to make sure they get there current!!
 

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