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Old 02-16-2011, 12:43 AM   #131
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I don't think you'd get the flow you'd need... unless you make like a maze or something. Need lotta light.. and lotta clean water. Other wise you'd get like stagnant water..
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Old 02-16-2011, 02:04 AM   #132
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A bottom-source screen that overflows out the top would actually SOLVE a design issue I've been having with doing a 3-pipe beananimal / calfo overflow system and an ATS. What frickin timing! I'll have to give this a lot of thought and run it by a few people...might be a eureka!
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Old 02-16-2011, 12:14 PM   #133
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That is interesting... I would love to see how it works...
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Old 02-21-2011, 11:49 AM   #134
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It turns out that the bottom-source screen is not really a good idea after all. The issue has to do with what is called the "boundary layer", which in fluid dynamics means that in a laminar flowing stream of water, the agitation at the surface (of the algae) is very low. So the more turbulent the flow, the more exchange there is at the boundary layer. The design would have to promote very turbulent flow across the screen, and the best way to do this is to cascade a thin layer of fast-moving water across the screen (waterfall style) or cause the water to rush past in a wave (dump-style).

Oh well.

Cleaning pics from this weekend, not a lot of production for some reason, but also I harvested on day 6 (last week was on day 8)





Harvest was pretty minimal, maybe 1 cup. I think the owner didn't feed that much this week. Also could be that I had to shut down filtration for about an hour to search the tank for a razor blade that I dropped into it, which I couldn't find. I guess I won't have to dose Iron for a while.
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Old 02-21-2011, 11:51 AM   #135
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I just realized that I haven't posted pics of growth for a while...

2/5





2/13







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Old 02-21-2011, 11:52 AM   #136
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Starting to get some Red Turf - stuff is tough to scrape off!

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Old 02-22-2011, 11:27 AM   #137
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That is true, You would never get as much surface flow with the whole thing full of water.
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Old 02-22-2011, 12:43 PM   #138
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floyd,the ats looks good,I've read your thread before and was wondering what size scrubber would I need for a 60g tank and 20g sump,these are uk gallons?

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Old 02-22-2011, 03:26 PM   #139
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So 60g US = 50g UK and 20=17 but I'll assume it's only 1/2 full at operating level, so that's about 60g US system capacity. A screen would have to be 60 square inches, or about 400 sq cm (387 to be exact). That's for vertical, lit on both sides. If you want to find some examples for ideas, go to Algae Scrubbers • Index page or the new sticky on RC here Algae Scrubber Basics - Reef Central Online Community
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Old 02-22-2011, 03:51 PM   #140
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Sorry floyd the other way round!! 60guk = 72 USA g,20 uk = 24 USAgallons
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