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Thread: 33x26cm algae scrubber using 10w LED flood

  1. #171

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    Just tested my water and my nitrate is still 50 and phosphate is 0.12 mg/l P or 0.43 mg/l po4 on a deltec test kit.Why isnt it coming down?

  2. #172
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    The algae is removing approx 7% of its dry weight as nitrogen. Approx 500grammes of algae (dry weight) removes about 70ppm of nitrate in a 450 litre aquarium (this figure varies a bit with the particular type of algae grown). You just need to grow more so that it can impact on the nitrate in your tank.

  3. #173

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    How do i grow more.

  4. #174

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    Do i need a bigger screen?

  5. #175
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    If I was you, I would back the lights a bit further from the screen, it looks like its too intense in the centre. As it greens up over the next few cleanings gradually get the lights closer to the screen again. Something I have started to do is clean only one side of the screen every 7 days and it seems to populate the screen faster (grows through from the uncleaned side). I used to get a 3 or 4 day lag in growth after cleaning, but not now. Maybe worth a punt.

  6. #176

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    Ok will have a go.

  7. #177
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    Need to clean all the dark stuff off the screen.

  8. #178

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    Jun 2012
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    I scraped all the algae off with a large razorblade,But how far do i go.

  9. #179
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    Use a brush if you need to. No black stuff should remain. Green stuff can remain.

  10. #180

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    Ok thanks.

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