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  1. #1
    Senior Member cdn beaver's Avatar
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    Sep 2004
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    169

    Sand - Please help ID

    Hello,

    I seem to have something brown that grows on my sand bed. It seems to be in full force after the lights are on for awhile, and is worse following water changes. Im not sure what it is, or what causes it. Is it detritus?, Cyano?, Diatoms?, Im not sure how to explain it, but after awhile it seems to form a very thin layer over the sand, only in areas that dont get hit directly by a power head, and are under direct light. It doesnt seem "hairy" or "slimy". I try to vacuum it up with out taking much sand during water changes.

    I hope the pictures help. Can anybody recommend a solution?

    Tank parameters:

    25 gallon w/ 5 gallon fuge
    110 Watts PC light - on approx 8hr/day
    SG 1.024
    PH 8.2
    Ammonia 0
    Nitrite 0
    Nitrate ~5
    Temp 80

    I have approx 2 inch aragonite sand bed, ~30lbs live figi rock, seaclone 100 skimmer, hagen 301 PH, Penguin 1140PH, Tank has been up and running since May 2004.

    Thanks for the help.
    Cheers,
    Mark

    Setup:
    27 Gallon Saltwater tank, 110W PC Light, Seaclone 100, 5 gallon HOB Fuge,Approx. 30lbs Live rock, Aragamax sand substrate.
    Livestock:
    Tomato clown, Mandarin dragonnet, Bicolor Angel, Assorted hermits and snails, Cleaner Shrimp.
    Corals:
    Assorted mushrooms, Zoanthids, Finger Leather.

  2. #2
    Senior Member Fisherman's Avatar
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    Apr 2003
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    1,408
    diatoms pretty normal.. will burn itself off.. especially on new tanks

  3. #3
    Senior Member cdn beaver's Avatar
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    Sep 2004
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    169
    I thought it may be diatoms, but my tank isnt very new. its been running for almost 1 1/2 years. How do I get rid of them?
    Cheers,
    Mark

    Setup:
    27 Gallon Saltwater tank, 110W PC Light, Seaclone 100, 5 gallon HOB Fuge,Approx. 30lbs Live rock, Aragamax sand substrate.
    Livestock:
    Tomato clown, Mandarin dragonnet, Bicolor Angel, Assorted hermits and snails, Cleaner Shrimp.
    Corals:
    Assorted mushrooms, Zoanthids, Finger Leather.

  4. #4
    Senior Member putz28's Avatar
    Join Date
    Feb 2005
    Posts
    287
    I'd load up your cleaner crew, not sure how many hermits you have in there but add a dozen or two.

    I'd pass on vacuuming the sand, let your cleanup crew do the work.

    What is your water source, if it's worse after water changes you may be putting soem unwanted nutrients in, try a RO system.
    125G in wall
    2 x 250 hqi
    4 x 4' actinics
    tunze wavemaker & 6060
    2 x 1200 maxi's
    quiet one 3000

    ...just started of course



    One day my daughter asked me for Nemo. Here we are thousands later and I'm just getting started.

  5. #5
    Senior Member cdn beaver's Avatar
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    Sep 2004
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    169
    Thanks guys for the help. Ive just recently switched to an RO source. Ive also only got about half a dozen or so red and blue hermits. How many sould I have for my 25 gallon?

    Thanks again for the help. A year and a half in, and I still know very little.

    Thanks
    Cheers,
    Mark

    Setup:
    27 Gallon Saltwater tank, 110W PC Light, Seaclone 100, 5 gallon HOB Fuge,Approx. 30lbs Live rock, Aragamax sand substrate.
    Livestock:
    Tomato clown, Mandarin dragonnet, Bicolor Angel, Assorted hermits and snails, Cleaner Shrimp.
    Corals:
    Assorted mushrooms, Zoanthids, Finger Leather.

  6. #6
    Senior Member putz28's Avatar
    Join Date
    Feb 2005
    Posts
    287
    I'd go with no less than 25 more blues on top of what you have already.
    125G in wall
    2 x 250 hqi
    4 x 4' actinics
    tunze wavemaker & 6060
    2 x 1200 maxi's
    quiet one 3000

    ...just started of course



    One day my daughter asked me for Nemo. Here we are thousands later and I'm just getting started.

  7. #7
    Senior Member piatchie's Avatar
    Join Date
    Nov 2004
    Posts
    878

    Lightbulb

    How old are your lights? I had the same problem when I set up my 50gal. I changed the lights and it went away! Just a thought. That's what worked for me!
    :fish3:Piatchie:fish3:

    Why is it called "cargo" when it goes by ship, and "shipment" when it goes by car?

  8. #8
    Senior Member Zookeeper's Avatar
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    May 2003
    Posts
    1,180
    That's brown diatom. If your tank is mature, and larger than 30 gallons, I'd add a tigertail cucumber.

  9. #9
    Senior Member StephG's Avatar
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    Aug 2003
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    1,103
    I had some of this in my tank also. I cut back on feeding and it gradually went away. I've heard that old bulbs might also cause this as mentioned above. I think I'm about due for a change also

  10. #10
    Senior Member cdn beaver's Avatar
    Join Date
    Sep 2004
    Posts
    169
    Thanks again for the help.

    My bulbs are not more than 2-3 months old. 1 is an actinic, and the other is a 50/50 (actinic/10 000K).

    I feed 1 block of frozen mysis shrimp with garlic gaurd or saltwater multi-pack every other day, and cyclopeze 2-3 times a week. Am I still over feeding?
    Cheers,
    Mark

    Setup:
    27 Gallon Saltwater tank, 110W PC Light, Seaclone 100, 5 gallon HOB Fuge,Approx. 30lbs Live rock, Aragamax sand substrate.
    Livestock:
    Tomato clown, Mandarin dragonnet, Bicolor Angel, Assorted hermits and snails, Cleaner Shrimp.
    Corals:
    Assorted mushrooms, Zoanthids, Finger Leather.

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