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Help! Algae Bloom

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  • Help! Algae Bloom

    Hi everyone - I am struggling with an algae bloom that's made my water very cloudy and has lasted a week now. I've done two 20% water changes but I'm still struggling to get it under control (also decreased lighting to 50% intensity the last two days). I could use any advice on where to go from here. It appears to be an algae bloom more than an bacteria bloom given the glass during the day when the lights are on gets very green. Anyone experience this?

    The only change recently was changing 50% of the zeolite in the reactor 4-5 days before it started but I did rinse/soak it overnight before including. Could it be a bad batch?
    1. Gross water volume of your complete system (incl. sump etc.) – 180gal
    2. Tank dimensions 6ft x 2ft x 2ft
    3. 1 inch sand bed
    4. Net water volume (incl. sump etc.) – 175 gal
    5. Are you using a CaCO2 reactor or other technique – NO
    6. Are you using a PO4 reactor (how long, how long ago, etc.) – No
    7. Are you using Ozone – No
    8. Are you using UV – No
    9. What skimmer are you using (type, rated water volume) – Bubble King Supermarin 250
    10. What are your actual PO4 and NO3 levels – PO4: Na / NO3: both read 0 on my test kits
    11. What are your actual Ca, Alk and Mg levels – CA 385, Alk 9.0-9.1 and MMagnesium 1400 (all tested by Trident)
    12. What filtration method do you use (refugium, DSB, Miracle Mud, etc.) – Zeovit Reactor 1.75L zeovit zeolite
    13. What filtration method do you use (refugium, DSB, Miracle Mud, etc.) – 1 ft Media block in sump
    14. Type of light (Watt, colour temp, how old, etc.) –36’ Aqualife T5, Illumagic, 5x Ecotech Radion G5 Pro
    15. What corals do you keep – LPS/SPS
    16. Tissue colour (light or dark) – Light due to intensity of lights.
    17. How long has the tank been running – 3 months, just over a month on fish
    18. Why do you want to use the ZEOvit system – Good success previously
    19. Any supplemental dosing (type, amount, why, etc.) – Used Vibrant when this algae bloom began
    20. Live rock (how much, how old, etc.) – 125 lbs live rock, 20% from established tank ran the 14-day cycle when I started 3 months ago
    21. Any present problems – Yes, algae bloom
    22. Problem description (tissue loss tips, tissue loss base, diatom bloom, algae, etc.) – causing coral tips to be minimal
    23. What test kit do you use - Salifert / Hanna / Red Sea / Trident
    24. Present dosing, amounts and intervals -
      Zeostart3 1.4 ml / day
      Sponge Power - 7 drops/day
      Zeobak 7 drops / 2X per week (I have upped in over the last three days to 7 drops daily as I read elsewhere in the zeovit forum this might help)
      zeofood plus 14 drops 3X / week (I stopped this when the bloom started
      Coral snow - once every 2 weeks based on dosage on container
    25. Other water parameters and water stability 79 degrees F, Sg 1.025
    26. Which salt brand do you use – Fritz

  • #2
    Can you please post a good picture of the stuff ? I would rule out the ZeoVit material if it is the original material as the reason.



    • #3
      Here is a view from today, had to wait until th elight had been on for a couple hours for it to start. One of them is after I cleaned the glass, so you can see the cloudiness. No one seems bothered by this but obviously a big issue.


      • #4
        Thank you for the pictures, to be honest my first thought was Dinoflaggelate but from the picture it seems to be something different as I can not see any kind of brown slimy strings on sand / rocks.

        From the pictures it looks more like a bacterial bloom to me, some changes I would recommend:

        Continue dosing as follows for the next 2 weeks:

        ZeoBac – 4 drops 2 x weekly
        ZeoStart – 0.4 ml 2 x daily (once in the morning / once in the evening so total 1.4 ml daily
        ZeoFood – stop dosing
        CoralSnow – 7 ml every other day

        Install a UV light temporary for a couple of days and switch it off for 2 hours while dosing if you do not notice a difference after the first week.

        While doing this keep a close eye on the PO4 and NO3 level, both should not increase.

        Once the water has become celar again continue dosing as follows:

        ZeoBac – 7 drops 2 x weekly
        ZeoStart – 0.7 ml 2 x daily (once in the morning / once in the evening so total 1.4 ml daily
        ZeoFood – 7 drops 2 x weekly
        CoralSnow – 7 ml 2 x weekly

        The KH is a little bit high, lets slowly drop it to ~ 7.5 and keep it there solid.

        I would also recommend to remove the filtration block in the sump you use.