Homebrew PCBs

On Tue, 07 Dec 2004 16:11:50 +0000, Les Newell <lesnewell@...>  
wrote:

>
> Hi Stefan,
>
> You can make holes in a plastic tube but they need to be very small. I
> used a small pin that I heated up with a candle flame. If you use the
> pin cold the hole tends to seal up as soon as you remove the pin. You
> don't need many holes. If I remember correctly my system worked best
> with about 5 holes in a 180mm length of pipe. I am working from memory
> here because my tank now has the holes built in.
>
> You need a pump with a reasonable flow rate if you go this route
> otherwise you may find that air only comes out of one half of the tube.
>

Ok, i'll experiment with poking holes in a hose then.
I thought maybe it is best to make the hose a U-shape, so i can feed both  
sides.
I can get a second pump if required, the one i have says 110 l/h.

Well, i'll try for hole-size, and how many holes the pump will supply at  
the given depth.

ST