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Unread 01/07/2018, 07:32 PM   #9918
Pandagobyguy
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Join Date: May 2012
Location: Overland Park, Kansas
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Quote:
Originally Posted by SantaMonica View Post
The "floating" screens I've seen people make have not worked; the screen needs to be up out of the water instead. Or, bubbles from beneath; but then the screen gets clogged with growth. That's why strings are better with bubbles. You could try making bigger holes in the screen though.



Sounds like what I was saying. Acros are mostly rock, and any transfer of rock through the air kills a part of it, and causes die-off. If the 4-cube scrubber was already thick, the extra phosphate might have made growth thick enough to kill the roots and let go. If so, it should be back to normal soon. Larger screens just have less water access from the edges of the screen, so the middle dies sooner when thick.



No, dying algae just put nutrients back into the water.



No pic



This is is very focused; maybe too much so.



Probably better and spread out.



Also focussed but ok for a small screen.



This one probably has good spread because there are no lenses.



For bubble upflows, these lights can be position and sized to the screen size, but will be 1-sided. To make them 2-sided, put a white plastic reflector behind the screen, angled to reflect light to the back of the screen as shown in the drawing. Or just use strings instead of a screen.
Thanks for the info!



Last edited by Pandagobyguy; 01/08/2018 at 01:16 AM.
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