New tank (5 weeks in), phosphate question

Discussion in 'Reef Chemistry by Randy Holmes-Farley' started by LMDAVE, Mar 8, 2018.

  1. LMDAVE

    LMDAVE Active Member Build Thread Contributor

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    My cycle has been compete and diatom bloom came and went, now have bright green algae on rocks and green hair algae on back glass, I finally tested phosphate for the first time with Seachem kit, and it appeared to be about 0.5, is that a bad high number at this early point of cycle?

    40 gal tank, sumpless, hob skimmer

    Ammonia 0
    Nitrite 0
    Nitrate 8
    Sal 1.024
    Cal 420
    Alk 9 dkh
    pH 8.2
    Temp 79

    I’m running Chemipure elite for my only source of carbon and gfo
     
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  2. Randy Holmes-Farley

    Randy Holmes-Farley Reef Chemist Staff Member Team R2R R2R Supporter R2R Excellence Award Article Contributor Expert Contributor

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    That is high, and I'd look to lower it, although it also isn't as bad as many people have thought.

    It will, however, allow for plenty of algae growth.
     
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  3. LMDAVE

    LMDAVE Active Member Build Thread Contributor

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    Thanks, I was hoping to hear that maybe it’s high in newly cycled tanks. But I’m going to work on getting it reduced.
     
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  4. Randy Holmes-Farley

    Randy Holmes-Farley Reef Chemist Staff Member Team R2R R2R Supporter R2R Excellence Award Article Contributor Expert Contributor

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    Depending on what you did to get to this point, it is perhaps not unusual. :)
     
  5. LMDAVE

    LMDAVE Active Member Build Thread Contributor

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    Well I was hoping to get some ideas of what I may have done (or doing), and best way to reduce it.

    I used RODI water front the beginning. I do have about 30 lbs of BRS Dry Rock that was cycled in my aquarium. I heard mixed comments that dry rock curing could leach phosphates.
     
  6. jsker

    jsker Reefing is all about the adventure Staff Member Team R2R R2R Supporter R2R Excellence Award Article Contributor Build Thread Contributor Partner Member 2018

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    Most likely the dry rock is leaching phosphates from the cleaning process.

    I would suggest a product with Lanthanum Chloride to get the phosphates down and look into setting up a GFO reactor to keep the phosphates down in the future.
     
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  7. Randy Holmes-Farley

    Randy Holmes-Farley Reef Chemist Staff Member Team R2R R2R Supporter R2R Excellence Award Article Contributor Expert Contributor

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    Dry rock can release phosphate, regardless of whether you are curing, cycling, or just dump it into an aquarium. Pukani is notable for this.

    There are many ways to reduce phosphate. GFO, aluminum oxide, lanthanum, growing macroalgae, etc. All work. :)

    You can also ignore it. Some great tanks have 1 ppm phosphate, but you do risk more algae problems.
     
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  8. TinyChocobo

    TinyChocobo Well-Known Member R2R Supporter Build Thread Contributor

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    I went with Dry Pukani from BRS and got a fair bit of hair algae. My Yellow Tangs cleared it up in a hurry though :).
     
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  9. LMDAVE

    LMDAVE Active Member Build Thread Contributor

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    Thanks, I will look into a Lanthanum Chloride product to reduce it, then try to maintain from there. Given my tank is only 40 gals (actually about 32 actual gallons with rock), I was hoping Chemi-pure Elite (with GFO) would do the trick for me. I have the bag in an hob filter. But I do wonder how much water flows through the bag vs. just over the top of it. If I see it continue in the wrong direction then I guess the next step up for me would be to set up an external GFO reactor.
     
  10. LMDAVE

    LMDAVE Active Member Build Thread Contributor

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    Yeah, I was figuring the green algae was just the 3rd stage of the new cycle (after diatom bloom), but the 0.5 Phosphate had me concerned. I would love a yellow tang, one of my favorite fish, but cant have one due to tank size. Learned that after committing to this tank.
     
  11. TinyChocobo

    TinyChocobo Well-Known Member R2R Supporter Build Thread Contributor

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    Yeah I went with an 88G and TBH I wish I went bigger... There are still some things I want to have that I can't because either the tank isn't big enough or if I put what I want - I'll have very few fish due to territory available.

    I'm a little over-stocked as it is - so once some of these fish get bigger I'm likely going to set up a second tank - although by then I'll likely GO BIG or go home. That said 88G is 'going big' compared to the 29G I had before.
     
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