Bryopsis - My options?

Discussion in 'Nuisance Algae' started by chas84, 29 Nov 2010.

  1. chas84

    chas84

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    Hi everyone,

    A few weeks ago I noticed a small amount of Bryopsis growing on a piece of rock in my tank. I did not think much of it, as I had the same happen in my Nano a while ago, but the Urchin took care of it. The bryopsis has now spread to about 5 rocks where it's growing in small clumps.

    I introduced the Urchin to the tank about two or three weeks ago, but he doesn't seem to eat it this time. As is usual the hermit, snails, etc. are also not touching the stuff.

    I'd like to introduce a herbivore to eat it, and have so far read that fish most likely (but not guaranteed) to eat it are Scopas Tang, Naso Tang, Bi-color blenny and Lawnmower blenny. Anyone have luck with something eating bryopsis?

    My only other options are to increase the pH (I read to 8.5?)or increase Magnesium. I'd prefer to rather add a herbivore instead of fiddling with the water chemistry. I don't want to explore the harsher options (like freezing the rock, boiling it, etc.).

    Any advice?
     
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  3. Sentari

    Sentari

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    I've heard raising you Mag above 1400 should help.
     
  4. Tony

    Tony

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    You seem to have a phosphate problem whcih may come from many sources like not using RO water, carbon and feeding to name a few. You can go the magnesium route like Sentari mentioned or you can used a product called Prodibio. The Bioptim and Biodigest will sort your tank out permanently after a month as the bacteria will remove the phosphates and nitrates out the water. I had a lawn a few years ago and after a month of Prodibio my alga was gone and has never returned. You can then use the product on a regular basis to boost your bacteria and keep these problems away
     
  5. chas84

    chas84 Thread Starter

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    Yip. Seems the best is to raise it to 1650ppm for 3 to 4 months, although I have read some posts on other forums where results were seen much sooner. Because I'm no expert at chemistry, I'm slightly concerned about the sulphates that are also added to the system when increasing magnesium with Epsom salts. But I have not read of anything serious happening, as long as a decent water change is done after the treatment is completed.
     
  6. chas84

    chas84 Thread Starter

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    Thanks Tony. Will have a look at the Prodibio.
     
  7. Quintonv

    Quintonv

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    How about a Sea Hare.
     
  8. chas84

    chas84 Thread Starter

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    This is an option, but has two drawbacks: They're hard to find, and they are very specialised feeders, feeding only on one specific type of algae (according to the type of sea hare), so one would have to either sustain the problem or find another home for him once the bryopsis is gone (and then hope it never returns, otherwise you'd have to find one again).
     
  9. Quintonv

    Quintonv

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    I found a few at VIP pets in northgate i bought one this weekend for 130.

    if he is finished with my tank ill put him up for sale so that he doesn't starve
     
  10. chas84

    chas84 Thread Starter

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    Ok cool. You also have a bryopsis problem? How's the sea hare handling it?
     
  11. viper357

    viper357 Admin MASA Contributor

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    To combat the possible increase in Sulphates, simply increase your water changes, for the 3 months that you are dosing magnesium, do 30% water changes once a month, this should be more than enough to dilute and remove the excess sulphates. The best way is to combine Epsom Salts (Magnesium Sulphate) with Magnesium Chloride. There is a recipe in Hennie's forum on how much to mix and dose.
     
  12. IMarine

    IMarine

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    Hi Chas i had bryopsis in my old tank,my water paramaters was 100% correct and also did heavy dosing of mag,that will slow the growth down but will not get rid of it,the best to do is boil your rock in ro water that will sort your problem out,or do big water changes what should help if you got a nutrient problem ,and the other thing is cut your lighting down by 60% a day and it will die down with in 2months or so
     
  13. chas84

    chas84 Thread Starter

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    Cool thanks viper! Will have a look at Hennie's forum. Just got word now that a Naso Tang would likely eat some bryopsis...
     
  14. chas84

    chas84 Thread Starter

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    Hi Imarine, you're lucky to have gotten rid of it! Gosh, the thought of "killing" my live rock makes me cringe hey... I hope I get this under control before I have to do something so drastic.

    Now that you mention lighting... Replaced a few tubes recently and added more, first step I think I'll reduce the lighting period and see what effect it has in a week. Then I'll slowly increase the ph to 8.5, also for a week, and then start magnesium dosing.

    Or maybe this is the perfect excuse to get a naso :)
     
  15. viper357

    viper357 Admin MASA Contributor

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    I'm not so sure about that, I would recommend doing some more research on that before going out and buying one, I don't recall ever reading about them eating it, could be wrong though, the only fish I have heard of that "might" eat Bryopsis is a foxface, but that is also a hit and miss.
     
  16. chas84

    chas84 Thread Starter

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    What is the minimum period I can switch the lights on for?

    I have the following lights over my tank, which is 75cm high:
    4 x 54w T5 (3 white, 1 blue)
    4 x 80w T5 (2 white, 2 blue)

    At the moment I switch the lights on around 8 in the morning and only off again somewhere after 8 or 9 at night.

    I have a few zoa frags, two small shrooms, mushroom leather, kenya tree and a blushing finger leather.

    Oh and some Bryopsis :)

    Would 4 or 5 hours a day be fine? Should they be on for one continuous period, or can they be on for a bit in the morning and then on again for a bit in the afternoon/evening?
     
  17. chas84

    chas84 Thread Starter

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    It seems to be a grey area, similar to the shrimp eating aptaisia issue. I've read of some fish that do eat bryopsis, but haven't spoken to someone yet who has anything that eats it.
     
  18. gaboon

    gaboon

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    I'm going on 2 months now of magnesium dosing and its still growing. Starting to raise the alk to 11 and may even try push the pH up to 8.5. Its driving me nuts!
     
  19. chas84

    chas84 Thread Starter

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    What are you other parameters? I've just tested, and they're not ideal:

    Salinity: 1026 @ 25.6*c
    ph: 8.2 (Going to increase this to 8.5)
    Kh: 7 (Going to increase this to 9)
    Nitrite: 0.02mg/l (Not ideal, but OK)
    Nitrate: 15mg/l (Just just OK? Only have softies and some zoas)
    Ammonia: <0.01mg/l
    Phosphate: <0.01mg/l (Probably the Bryopsis using it all up)
    Calcium: 400mg (Borderline OK)
    Magnesium: 840mg/l (Way too low)

    I'm busy reading up on the effects of increasing the ph and Kh will have on the calcium and magnesium tests. Also wondering if Bryopsis could be a side effect of too low magnesium.
     
  20. maj

    maj

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    I had the same issue,due to high phos and nitrate I had outbreak of byropsis.
    I removed the rock,chipped off all signs of byropsis theb rinsed the rock in ro water
    Then went onto dosing fauna marin same like prodibio.never had issues agen and has been
    3months and I feed heavy
     
  21. Tony

    Tony

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    Probiotics are probably the simplest and most effective way of removing your problem and keeping it gone
     
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