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Thread: Converted Back of Tank on Nano Cardiff to UAS - First Time build

  1. #11

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    Here are some pics from Day 14 - Still pretty much the same with brownish type algae (but more of it on screen). There are some nice green in two small spots (lower corner and then at the top of the screen). The top of the screen sometimes sticksout of water due to evap in sump area - so that is peculiar. I switched to a air bubbler instead of Venturi pump and also moved the screen closer to the glass (about 1.5" now away from LEDs). I did not wash the screen at all. What else should I do? Is this normal?Click image for larger version

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  2. #12

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    Tank Params

    SG: 1.025
    PH: 8.3
    dKH: 9
    Nitrate: 10ppm
    Nitrite: 0
    Amonia: 0
    Calc: 420
    Temp: 77F

  3. #13
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    The larger bubbles from the bubbler will surely help; small bubbles get routed away from the screen.

    Cover 2 of the LEDs with foil, to reduce the light, and let it continue for another 2 weeks.

  4. #14

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    Santa Monica

    Here is an updated picture. Still pretty brown throughout the screen. Curiously the top section of it is a very nice bright green. This section is sometimes out of water because of me forgetting to top the tank off. So it kind of tells me that it needs more O2? Maybe suggesting that a waterfall type scrubber is a more efficient design? (not suitable fo this tank - but I was going to put one in my larger newer tank).

    Still running with 3LEDS this time (about two weeks now) the other 3 LEDS are completely blocked.

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    Any suggestions on what I should try next? This does not seem to be working.

  5. #15
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    The top is green because it get most of the air/water interface turbulence. The green should spread downwards, however.

    Let is go another 14 days.

  6. #16

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    Here is an update. The pic makes it greener then it is in person. The green portions are not thick at all, but just a thin color of green. The darker areas are much thicker and are a deep purple type color (kind of gooey). When I pulled it out I also noticed a few critters crawling on the screen (pods I assume). I did run it under the sink about a week ago. So a couple of questions:

    1) What is the dark purple stuff, what does this indicate?
    2) Should I remove the screen I put over the 3 LEDs to make it a total of 6 LEDS?

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  7. #17
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    Dark is always low light, so yes you want more LEDs.

  8. #18

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    Click image for larger version

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    Updated picture - from trhe last update over 2 weeks ago - I removed the screen that was blocking the 3 other LEDS, ( so now has 6 LEDS on) and also made the time about 20 hrs a day. It seems like I made it worse - now with yellowish slimy areas and completely bare areas. I do have quite a bit of Amphipods crawling on there - Not sure if they contribute to how it looks. This doesn't seem to be going they way I would like and was thinking that maybe I should just go back to fugium in back of tank instead.

  9. #19
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    Cover 2 of the middle LEDS, and it will fill in.

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