GFO overdose?

Discussion in 'General Equipment, Hardware, Filtration' started by HawaiianReef, Feb 11, 2019.

  1. HawaiianReef

    HawaiianReef Active Member

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    Is it possible to run too much gfo?
    If yes, what are effects?

    David
     
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  2. SPR1968

    SPR1968 Fish & Coral Addict! R2R Supporter R2R Excellence Award Reef Squad R2R Secret Santa UK Reef Club Member Reef Tank 365 Build Thread Contributor Hospitality Award

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    I believe there are incidents were very large amounts can have an effect on alkalinity, although personally I haven't encountered this in any noticeable way using Rhowaphos which is what I use.

    The effects of to much would certainly strip the system of phosphate and although you don't want a reading of absolute zero, which would not be good, you want it fairly low at around 0.03ppm depending on what your trying to achieve in your system

    If my Hanna checker reads 0, im happy as it has a margin of error of +/- 0.04 and with my bioload its not likely to be zero at any time.
     
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  3. dwest

    dwest Well-Known Member

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    You have the risk of dinoflagellates if you strip too much phosphate. Especially if your tank is relatively new.
     
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  4. HawaiianReef

    HawaiianReef Active Member

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    Thanks guys!
    I have a reactor for gfo, but it's rated up to 500g. My little 125 DT is way to small even with a 75g sump.
    Too bad. I love this reactor.

    David
     
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  5. SPR1968

    SPR1968 Fish & Coral Addict! R2R Supporter R2R Excellence Award Reef Squad R2R Secret Santa UK Reef Club Member Reef Tank 365 Build Thread Contributor Hospitality Award

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    Well just put less GFO in to the reactor if you have that already?

    I dont think it matters in the reactor size, it’s the amount of GFO in it that could cause issues
     
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  6. HawaiianReef

    HawaiianReef Active Member

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    I was told that the flow rate is the factor.
    I bought it for a 300g build that I changed my mind. I doubt I'd get half my money back if I sold it.
    I might just keep it and have a really cool bio pellet reactor.
     
  7. HawaiianReef

    HawaiianReef Active Member

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    I wonder if I could mix the bio pellets and gfo to lower the effects of the gfo. Sounds logical..

    David
     
  8. Thingsibuild

    Thingsibuild Active Member

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    Just slow the flow and add less gfo. If you put half of the recommended gfo in reactor and crank the flow up it's not going to strip your water. It can only take so much out at any given time.
     
  9. PatW

    PatW Valuable Member

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    Corals need a certain level of phosphates. You do not want phosphates to be zero. The usual recommendation is something a bit under .03 ppm for phosphates. If phosphates are too low such as functionally zero, corals will not grow and can decline and die.
     
  10. lolgranny

    lolgranny Well-Known Member

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    For flow all you need is a gentile tumblr of the gfo. Size of the canister doesn’t matter. Material, however does. I have one rated for a 200g on my 700gallon and use it only as my po4 gets above 0.10. I prefer keeping it around 0.04, but I feed ALOT so it creeps up on me occasionally. No harm has been done to any of my corals and I’ve let it get to 0.30 before. Laziness and lack of testing did that. Lol
     
  11. HawaiianReef

    HawaiianReef Active Member

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    Bashsea told me not to run the reator because the amount of gfo doesn't matter as much as the turn over rate, or flow.
    But I have it, so I think you guys convinced me. Im going to at least try it out and see how it goes. Besides, this reactor looks So dang Cool! So that alone should be the deciding factor, right?? :cool:
     
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