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Old 05-04-2007, 07:51 PM   #11
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Cyno bacteria would be my guess.. Grows on the sand, slimy easy to vac.. Cyno comes in different colors. Check phosphates and post numbers.. Not sure what a nutrient analyzer is? I would use a test kit.
how old are your bulbs?
Low flow, nutrients and low flow all help cyno grow.
Are there air bubbles trapped in it?
post a pic..
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Old 05-05-2007, 11:40 PM   #12
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It is not cyano, I have had that in the past and this is very different. i just vacuumed most of it out so I don't have any good pics of it. Too busy this weekend to test (family visiting) but will try and do so on Monday.

BTW, a nutrient analyzer is a laboratory instrument that measures nutrients. It basically is a test kit, just a $60,000 one that is accurate to 2 decimal places at parts per billion for any of 5 nutrient parameters (nitrate, nitrite, ammonia, phosphate, silica).
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Old 05-06-2007, 05:24 PM   #13
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$60,000 test kit.... NICE Can you send me one?
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