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I was watching this utube vid on comparison of air tube as opposed to powerhead. He said the air pump was better for bio filtration, and the powerhead was better for maechanical filtration.

Also he said the lower down you put airhose in filter the better it works. Can anybody comment on the best way to use air hose. TY
 

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Also he said the lower down you put airhose in filter the better it works.
The lower the hose, the more water flow. Most airlines attach at some point, so how low you put the hose isn't really an option. But if DIY, then just drop it down low, and adjust the air flow, if needed, via an air valve.
 

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For the air set-up - my filters have an air nipple at the top and also underneath the top cap. I separate the fittings and place a short line inside the filter with an air stone at the end which roughly reaches the bottom of the filter. Attach the top line and fire it up. Takes 1-2 minutes.
 
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