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bunkerboy
08/21/2007, 05:31 AM
I purchased a tunze 9010 about three months ago... it is in a FOWLR 90 Gallon, and runs well... my question is, should i just be getting a thick black pudding like substance on the INSIDE of the narrow part of the cup leading toward the top, or should i be getting many cc's of dark water in the collection cup? Right now i have to wipe out the inside of the tunnel daily to get out this black sludge, but i do not get many cc's of water... the bubbles are breaking at least halfway up the collection cup. Bunker

Aquadepot
08/21/2007, 07:55 AM
Hi bunkerboy,

You could try raising the height of the skimmer a little if you have already adjusted airflow.

Regards
Graeme

rvitko
08/21/2007, 09:10 AM
The sludge is normal and breaks the foam down, normally though cleaning this weekly should suffice. I agree with Graeme, raise it about 1/4-1/2" and open the air flow about 1/4 turn more.

bunkerboy
08/21/2007, 09:41 AM
So is the ultimate goal a dark water that forms in the collection cup, or is it the dark sludge? Bunker

rvitko
08/21/2007, 09:55 AM
You will get both, the skimmate will generally be the color of light coffee to dark tea but sludge innevitably forms on the cup wall as well.