help, weird plan grow on anubias leaves

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recently i see little weird plan grow on my anubias leaves and java moss. Here is the picture i took. it look like spreading on my tanks also. what should i do to get rid of it ?

 

[msjinkzd]

That is bba, you can try spot treating with excel, but you need to figure out your nutrient imbalance to be "rid" of it. You would manually remove all that you can, trim the worst leaves, and then treat. Here is some information: http://www.thekrib.com/Plants/Algae/red-algae.html