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Thread: Phosphates

  1. #1

    Join Date
    Dec 2011
    Location
    USA
    Posts
    5

    Phosphates

    Hello,

    My scrubbed tank has been running for 3 months. scrubber on for 3-4 weeks.

    im starting to see green algae finally.

    my nitrates are not detectable for the last few weeks (double checked with friends test kit), but still seeing cyano in the sump. My corals and fish have been doing great, until recently.
    tank is 29 gallon with 10 g sump, 2 x 23 watt (6500k) lights on scrubber 10 inch wide grid, 650gph return, 350gph@ 4ft of head. DIY LED for DT, 24 x 3w cree xp-e/xp-g 12 cw/12rb, 60degree optics. 14" from water surface.

    no algae in dt

    I have
    maxima clam
    purple montipora plate
    stylophora
    staghorn

    galaxia
    frogspawn
    hammer
    welso brain
    zoanthinds

    metallic mushrooms

    2 mocha occ clowns
    1 sixline wrasse
    1 starry blenny
    1 hectors goby
    1 cleaner shrimp
    1 peppermint shrimp

    astrae snails
    lettuce nudibranch


    I have been feeding heavy to get the algae growing well.

    Lately alot of the zoathids are closed, the mushrooms dont look great, and the galaxia /polyps aren't very open.
    the clams looks great, the sps look good, welso, frog, hammer and all look good.

    fish all look good.

    I dont have a phosphate test kit as i understand they are pretty much useless. but it would make sense that i have phosphate because of the cyano in the sump and ive been feeding ALOT. however, shouldnt the scrubber be taking the phosphate up?

    should i go get some phosban, gfo, or something of the like to see if this brings them around?

  2. #2
    Administrator
    Join Date
    Oct 2008
    Location
    Salt Lake City, Utah, USA
    Posts
    10,566

    Re: Phosphates

    Cyano gets N right out of the food particles, which is why "cyano does not like flow"... the flow moves the food particles off of the bottom surfaces. Anywhere food particles set or hit, cyano can grow, no matter how low P is.

    You can't judge P by looking at cyano; you have to look at coralline or stony growth.

    Corals will probably be fine in a week.

  3. #3
    kotlec's Avatar
    Join Date
    Nov 2010
    Location
    Lithuania
    Posts
    710

    Re: Phosphates

    What Is you Ph , Alk and Ca ?

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