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Good growth but pale/brown color

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  • Good growth but pale/brown color

    hi,everyone here.This tank was set up December 2019 with 14-day dose and live rocks.From the begin everything is good,no cynon,no dino.In these months,most of the coarls grow fast but not show perfect colors.
    My tank info.
    1. Gross water volume of your complete system (incl. sump etc.) - US gallons / UK gallons / liter 250L
    2. Net water volume (incl. sump etc.) - US gallons / UK gallons / liter 200L
    3. Are you using a CaCO2 reactor or other technique yes. diy Ca-CO2 reactor
    4. Are you using a PO4 reactor (how long, how long ago, etc.) No
    5. Are you using Ozone No
    6. Are you using UV No
    7. What skimmer are you using (type, rated water volume) Reef Octopus 110s
    8. What are your actual PO4 and NO3 levels NO3:0-0.5(salifer)PO4;0-0.01(hanna Hi736)
    9. What are your actual Ca, Alk and Mg levels Ca:400,alk:6.7,Mg:1320(all test by salifer)
    10. What filtration method do you use (refugium, DSB, Miracle Mud, etc.) Full zeovit with white cotton
    11. Type of light (Watt, color temp, how old, etc.) 150W HQI(XM 10000K,4 hours),two XR15 G4(AB+ ,10 hours),four 24w T5HO(2 white,1ATI blue,1ATI FIJI Purple,10 hours)
    12. What corals do you keep most are sps
    13. Tissue color (light or dark)
    14. How long has the tank been running about 6 month
    15. Why do you want to use the ZEOvit system get vivid color
    16. Any supplemental dosing (type, amount, why, etc.) no
    17. Live rock (how much, how old, etc.) about 15kg
    18. Any present problems most corals with good PE,fast growth,but pale/brown color
    19. Problem description (tissue loss tips, tissue loss base, diatom bloom, algae, etc.)
    20. What test kit do you use (how old, recently switched, etc.)
    21. Present dosing, amounts and intervals (ZEOvit, ZEObak, ZEOfood, ZEOstart, ZEOspur2, etc.)
    Zeovit :0.5L changed every 8 weeks
    Bak:2 drops*2 per week
    food:2 drops per week
    Star3:0.1ml*2 daily
    Sp:2 drops every other day
    AA:2 drops daily
    CV:3 drops daily
    pif:2 drops* 2 per week
    Fe:2 drops* 2 per week
    CB:2ml mix with 2ml FWS daily
    Xtra:2ml daily(in past week,i changed to Xtra special with same dose)

    22. Other water parameters and water stability (salinity, temp, etc.)

    23. Which salt brand do you use
    red sea blue bucket
    I know there are a lot of questions. Please be as detailed (and honest) as possible and feel free to elaborate on anything else you think may be important.
    some pictures
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    Attached Files

  • #2
    What is the potassium level? K + ~ 380 mg


    • #3
      hi jacky!the k+ level is 380-400 test by sarlifer


      • #4
        The corals are looking healthy but I agree coloration could be improved. Have you already tried to do more water changes temporary lets say 15% - 20% three times while 10 days to refresh elements in a balanced way ?

        It could also be a lighting spectrum issue, have you already checked if the LEDs spectrum you use is ideal ? Sorry I can not help you with the setting as I never used LED so just a idea.



        • #5
          Alexander thanks for your replay!
          I just do regular WC about 10% weekly! I will follow your advice to do three large WC and see what will happen!


          • #6
            one more question.Can I continue the dose during the large wc? or just basic dose for bak,star3,sp?Thank you!


            • #7
              You can keep the dosing regimen, no change is necessary.