Algae Scrubber Basics

Karim

The light brown algae is the 1 stage and than mine started to grow Cyno on both the netting and inside the sump. I have been removing the Cyno and the algae started turning black ( I think I had a lot of phosphate in the DT) After 3 weeks I noticed green patches starting on the netting
 
I don't think it's algae.. it doesn't stick to any surface. It's like a brown powder and not diatoms. more like a residue.

<a href="http://s1062.photobucket.com/user/karimwassef/media/D65AF21A-8FAB-4765-A58B-5D955D40DDB3_zps9eglgmo7.jpg.html" target="_blank"><img src="http://i1062.photobucket.com/albums/t496/karimwassef/D65AF21A-8FAB-4765-A58B-5D955D40DDB3_zps9eglgmo7.jpg" border="0" alt=" photo D65AF21A-8FAB-4765-A58B-5D955D40DDB3_zps9eglgmo7.jpg"/></a>

it has no bubbles and blows away like sand.

I turned off the blue light to take a better picture of the screen:

<a href="http://s1062.photobucket.com/user/karimwassef/media/E6E569C1-679F-4738-B679-50AED63C70A0_zpsqdyocmp4.jpg.html" target="_blank"><img src="http://i1062.photobucket.com/albums/t496/karimwassef/E6E569C1-679F-4738-B679-50AED63C70A0_zpsqdyocmp4.jpg" border="0" alt=" photo E6E569C1-679F-4738-B679-50AED63C70A0_zpsqdyocmp4.jpg"/></a>

It's getting to be a very dark brown
 
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it is in my garage ... If it was pollen, I'd expect it on my wife's car or on my workdesk in the garage, etc...

This is how I measure the insect invasion as it waxes and wanes
 
I've got something similar that settles on top of my ATS pump which is in an area with the skimmer. I just figured it was debris from the overflow. Like yours, mine is almost like sand but its not hard.
 
I don't know if it's hard... I haven't touched it.. it could be soft particles. if it's organic detritus from the dying cyano, it would be soft.
 
Need to decide... take it down and clean it off (assuming it's dirt) or let it be and see if it it turns green (assuming it's a base for algae).
 
Weekend growth pics...
 

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red LED sheet is done too... PAR readings later today I think. I should be able to mount it and start running it on the back side tonight.
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