Re: [Killietalk] making the raingutter de Bruyn filter

[Barry Cooper <bjc3 at centurytel_net>]

Bill,

My advice would be to make the holes in the gutter big. I used to have some 
de Bruyn style filters above my sump when I was using a recirculating 
system. The drainage hole in the gutter was 1", covered by a screen. You 
want all of the water to drain out of the gutter, at least at a rate faster 
than the input. Despite Wright's experience, I think you'll find that 1/16 
holes quickly clog due to bacteria etc growing on them. Remember, you are 
trying to get bacteria to grow on these surfaces!

More tricky, in my experience, is getting a fairly uniform drip over the 
surface of the rock. You want the rock to be always wet, but not immersed 
in water.

Barry

At 10:36 PM 5/8/2004 -0500, you wrote:
> Wright wrote:
> > I never exposed the red lava to very bright light. That might have grown
> > some algae and caused clogging. IDK.
>
> --Aw gee, you'd have to mention algae:-) I was  going to
> place a 13w cf light strip on the front, which is why I'm
> doing the filters across the back. Hummm, still like the 1/16" holes making
> smaller raindrops back into the tank.
> I could stagger them with 1/2" spacing: _-_-_-_-_
> which hopefully would do the trick. Thanks to you both,
>
>  Bill
>
>
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> Archives are at http://fins.actwin.com/killietalk/

_____________________________________________________________
Barry J. Cooper, Prof. Emeritus, Dept. Biomedical Sciences, Cornell University
Professor, College of Veterinary Medicine, Oregon State University
Home address: 27505 Riggs Hill Rd., Sweet Home, OR 97386 


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