Black algae and high phosphates

Discussion in 'Urgent Help Needed' started by tinusb, 13 May 2009.

  1. tinusb

    tinusb

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    Hi all - thanx for the advise.

    Got phoned by a friend. He's got a major problem in his tank. He cleaned his front glass panrl yesterday evening and can hardly see thru it 24 hrs later. Tank capacity is 300litres with relatively little livestock. He has a skimmer too (unknown to me) and also has a canister filter.

    Problem 1: phosphate level = 4.0mg per litre
    Problem 2: substrate covered with algae - first red, then brown and then black - looks like a plastic layer

    He feeds frozen food daily. Also freeze dried daily.

    I recommended 10% waterchange, stop frozen food and take canister out.

    Any other recommendations/advise?

    Thanx!
    Tinus
     
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  3. jacquesb

    jacquesb Retired Moderator

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    Hi Tinus - I would suggest to do at least 3 waterchanges, each of 20% - over a period of 3 days.....

    Also - that high phosphates CAN possibly kill lifestock.

    He should IMMEDIATELY stop feeding frozen food, until he can control his phosphates...
    Try and get him to get some macro algae and a strong globe, for his tank's sump.....
    Also - for now - try and get him to reduce his flake food feeding to once every two days....
    The fish WON'T suffer - I promise you!

    Good luck with your friends' tank, mate! ;)
     
  4. THE ANIMAL

    THE ANIMAL

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    Yes Tinusb he can first stop feeding the fish daily only once a week and once on weekend's. Then what is the volume that the skimmer can do? Can he post some pics of his setup so we can go from there.
     
  5. riyadhessa

    riyadhessa

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    Tinusb Post Some Pics Of The Tank
     
  6. tinusb

    tinusb Thread Starter

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    Guys, he doesn't have internet at home. I'll see whether I can get him to take some photos - but yes, gave him all the advise. Will keep you posted :)
     
  7. lIghty

    lIghty

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    Agree with jacques

    Also, try remove it by hand if possible, as when you lower the PO4, it could cause the algae to start to die, causing further problems.....

    Sounds like he need a bigger / better skimmer.

    good luck
     
  8. JD167

    JD167

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    How is he doing water top-ups? RO or tap water? Also, when last did he clean that canister filter? They are nitrate bombs if not cleaned regularly. Taking it out is a good idea.

    Depending on the livestock in his tank, he might also be over feeding slightly.
     
  9. IG

    IG

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    hi i have had this problem with two of my tanks.

    firstly there is an aditive out there by aqyamedic called anti red it will sove your problem tempararely. it is safe to use with all live stock so u dont have to worry.

    as i said it will stop the problem temporarely.

    algae of the sort you are describing mainly comes from a phosphate and poor wter quality.

    i reccomend at least 25% water change
    if you are not using revers osmosis then you will have a much harder time getting quality water.
    if the water is not beeing broken on the water level the tank is sufecating and you probably have a build up of CO2 iether drill a whole and instal a overflow or use a power head in the direction of the surface to breack the water surface level.
    make sure your skimmer is working properly.

    you nee about 7 hours of light check how many hours the lights are on for.
    incraese current in the tank by adding iether a wave maker or a simple power head.
     
  10. IG

    IG

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    sorry it called aquamedic anti red

    i forgot to tell you try and remove as much as you can by siphoning it
     
  11. Neil H

    Neil H Moderator MASA Contributor

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    Tinus, I think pics are really what is needed for propper help here, but failing that .... perhaps ask your mate the following then we can come up with more advice.

    does he run a sump with a DSB
    what is his water turn over through the sump if he has one
    what is the flow turn over in the DT
    what substrate does he have in the DT
    How much LR does he have
    is he topping up with RO or Tap water
    What is the photoperiod of the tank and what lighting is he running?

    I agree with the advice to do water changes and manually remove as much as possible

    With Phos that high it may be a good thing to run phos remover asap to bring the levels down !
     
  12. tinusb

    tinusb Thread Starter

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    Hey all!

    Well, all the advise helped. He lost both his nemmies and one of his tangs, but that's to be expected with the extreme high phosphate levels he had. His current reading for phosphates is 0.15mg/l from something like 4.0 or 5.0 mg/l.

    Also it appears asif the algae is busy dying off - don't know whether they might have flourished on the high phosphates level.

    Thanx for all the help guys!!!!!
    T:peroni:
     
  13. Midasblenny

    Midasblenny

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    A lanthanum based Phosphate remover (liquid) would have been advisable to reduce the phosphates safely.
     
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