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Blake

Bryopsis!

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For the past 2 months I have had the pest macroalgae, Briopsis, growing in my tank and it is starting to get really bad IMO. Now i know the only sure fire way to get rid of this stuff is to raise my magnesium levels to at least 1500 ppm. But I have an SPS dominated tank and raising the magnesium too fast or at all could kill them all off. However, I have nowhere to put them while raising the magnesium levels. So I have a 100 gallon tank and a 30 gallon sump and my question is how to raise my magnesium levels slowly enough so that it does not wipe out my Acros? (as far as increments go.) i.e. Should i dose magnesium once one week and then wait 3 or 4 weeks to dose again or what? Please leave your thoughts on this as all will be greatly appreciated!

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Updated 02-12-2012 at 01:23 PM by melev

Tags: @melev
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NEED HELP STAT! , ‎ Questions - Need some input

Comments

  1. cyano's Avatar
    what is your magnesium at now? and the speed at which to dose would depend on the amount dosed per increment. ie. someone who dosed more would obviously have to wait longer before dosing again rather than a little at a time more often.
  2. matt_longview's Avatar
    I'd be willing to raise mine about 40-50 per day. I'd try to cut that up into as many pieces as you could. So you'd rather raise it 10ppm 5 times a day rather than 50ppm all at once. Plus if you raise it 30 and you notice anything looking funky you can always skip the last two of the day. If you go straight with 50 what's done is done!
  3. losbeek's Avatar
    im with matt on this one. always safer to go smaller doses more often (if possible).
  4. melev's Avatar
    It's been a while since I read up on killing Bryopsis with Magnesium, but as far as I recall people didn't lose corals to the higher Mg. It was the snails that took the hit. Using Kent Tech-M (not any old magnesium supplement), hobbyists raised it up to 1600 or even 1800ppm to kill it off.

    I battled bryopsis myself: Using a powerhead or turkey baster, blast the plants well. Detritus traps within the roots to create a mini deep sand bed to feed itself. Stripping it of these nutrients will help. Ripping it off, pinch by pinch (or via forceps) will reduce mass. Lettuce nudibranchs will eat it. It is a slow battle.

    Foxface fish will eat it.

    If you do dose to raise Mg up, and it all doesn't die leaving you with one or two stubborn areas, one guy turned off all the flow and used a syringe full of Tech-M to baste the specific patch of algae. 10 minutes later he turned the flow back on and made sure that solution mixed into the rest of the system and not to land on any one coral. The bryopsis turned white and died over the next week.

    It will take a long time for the Mg to drop, but once it finally does you can add more snails again.
  5. Blake's Avatar
    Ok so the magnesium wont kill my acros??? Ol good and marc how slowly should I raise my magnesium as far as incraments over time with the tech M for roughly 130 gallons of water????
  6. melev's Avatar
    50 to 100 ppm per day should be fine. 50 if you want to be safe. TECH-M only. Nothing else has the same results.
  7. dread240's Avatar
    I'm in the fight currently myself. I've been raising about 75-100ppm each day and have seen absolutely no effects on my corals at all. In fact I think the higher mag is helping some of them as they seem to have even higher polyp extension... I normally had it at like 1150 mag and I'm up to 1650 now
  8. melev's Avatar
    Usually, Mg should be around 1300ppm. Three times the calcium level. Over the years, I've kept it around 1400ppm as montipora did better at that level, color-wise.
  9. Blake's Avatar
    hey melev do u use ur tank water for QT or do you mix new water?
  10. melev's Avatar
    Blake: I use tank water usually. Sometimes I'll have newly mixed & aged saltwater handy and will use that instead. As long as temp, pH and salinity match, it should go well.

    Update your avatar and profile pictures, already.
  11. Blake's Avatar
    haha i would if i knew how! haha
  12. Blake's Avatar
    @dread240 is raising your magnesium helping at all??
  13. melev's Avatar
    Quote Originally Posted by Blake
    haha i would if i knew how! haha
    You already have a profile picture, as is evidenced at the top of your blog (right panel). You need to add a picture for your avatar next. Click on Settings (very top right of this screen) and then Edit Avatar (left column half way down page) to insert an image.
  14. Blake's Avatar
    there you go happy now marc????? hahahaha
  15. melev's Avatar
    So much better than a default avatar.
  16. Blake's Avatar
    so @melev is 1/4 teaspoon per gallon raises the tank by 18.3 ppm a day how much should i use to raise roughly 130 gallons of water by 50ppm a day?? should i just forsake the .3 and just do it at 18? or what? p.s math is and always was my worst subject
  17. melev's Avatar
    3/4 teaspoon should be okay.
  18. Blake's Avatar
    3/4 teaspoon per gallon? ok
  19. melev's Avatar
    Double check that math. If you want, use this calculator: http://reef.diesyst.com/chemcalc/chem_calc3.html