Originally Posted by jock7575
How about black beard algae? Would be nice if you could shed some light on what you think cause it.i had stable water conditions for a long time and it just came out of nowhere.
I have been putting a lot of time into this. I can tell you that various Nitrate and Phosphate levels have not helped at all. I have consulted with many many experts on this. Here is the best info I have for you.
The spores seem to hitchhike in. Mostly on plants. Not in water from the sink or in the air. Many people now will dip any new plant in a solution of 20 parts water and 1 part bleach for 2-15 minutes depending on the species. This should kill the BBA before it gets into your system.
It can exist in bright and low light tanks and pH,GH
,Nitrate,Phosphate, Potassium, and Iron levels do not seem to have any relationship.
It does seem to have a correlation with organics in the water. That means waste that has broken down to the point where it can dissolve in water but is still not Nitrate or phosphate yet.
Many have reported that increasing amount and/or frequency of water changes have helped them with this. It does not always.
I have tried using ROX Activated Carbon and Purigen by Seachem to try to beat it that way. It did not hurt but it did not help either.
I heard a talk over at Scapefu which says there is a correlation between how many hetero tropic bacteria there are and BBA. Where there is one there will be the other. Organics cause this type of bacteria to multiply rapidly. One theory says that Lamanea (One strain of BBA) seems to thrive on Vitamin B12. B12 is produced when those bacteria I mentioned eat up all the organics in the water.
Siamese Algae eaters can eat it but they have to be the real ones. You need to look at pics of how to tell the fakes. There are many. They also have to be under 3 inches long. When they are old they loose interest in BBA.
Amano Shrimp also eat this BBA as well but harder to get. I order mine from Rachel O'Leary here:
Invertebrates by Msjinkzd | Specializing in invertebrates and micro fish from around the world.
If you want to kill it then 3% peroxide from the Drugstore or Flourish Excel by Seachem will kill it when dosed directly onto it. Don't go above 4 ml of 3% peroxide per gal
of water IMO
. Excel is toxic so read up on it. It turns red after it dies. Usually about 24 hours later.
I find both of those can damage plant leaves. If it is on a leaf just cut the leaf. It spreads slow in many cases so that helps.
I think that is all I have to offer you on BBA. It is one of the very hard types of Algae to beat and it takes time. Even of you are doing everything right. It is still very much a mystery in the hobby.
Edit...It just occurred to me aeration really helps break organics down faster as well. Make sure you have enough.