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Re: Questions about water circulation

Reid writes:

> Rather than using a powerhead to generate flow, would it be possible to
>  use a wide, shorter lift tube, with a submersible heater positioned
>  directly IN the lift tube?  In this way, one might be able to use
>  convection to generate EXTREMELY gentle water flow, much more so than
>  with any pump.  Has anyone contemplated/tried this?

Exactly.  That is what I am trying to do with air-induced flow, or at least
thinking about trying.  See my previous post.