Tom Barr;26595 said:No, it's not GDA.
It's a type of epidendric algae, somewhat close to Colechaete *(GSA).
In a sense, it's a welcomed addition.
I have some plecos I'll be adding in a few weeks that will likely remove every bit of it, but not gnaw the wood too much.
I only have a slight touch out of the reach of the rubber nose plecos in another tank.
This species of alga is really never an issue nor a problem, some do not like it, but it looks nice to me. High light, current and wood are the causes. It does not fair well at low flow rates or where diatoms might cover it, low light etc. I do not think it will last long now I've started adding plecos, the Gold Nuggets will maw on it some as well.
If you ever had issues with wood algae, a Panaque will gnaw everything off for you. Rubber noses are good and will do not harm to other fish, not gnaw nearly as intensely and still remove the algae.
My curiousity is piqued by the explanation of the epidendric algae. When you say its not a problem I assume thats because its a type that most algae eaters will consume as food.
I believe I have some on my driftwood, it looks more like a kind of moss, either dusting of or very short fine hair carpet, is that correct? I was trying to reference it to the list of common algaes but it did not seem to match (its not slimy like BGA, nor clumpy like BBA - which I had and seem to have overcome using your recommendations).
Tried googling it but simpy wondering if you have more thoughts on this algae as it does not get any press in the aquarium list of algae greats to go down in history.