black algae all over plants

[maudsley]

hi guys can anyone help me,

i have tested water and all results are perfect but
i have started getting this black hair like algae all over my plants and its started on the rocks, wood and filteration pipes aswell. so this wk end just gone i totally stripped all wood rocks out, binned all plants as i can not clean the algae off them without damage. hoovered all gravel. the re planted tank with new plants and re decorated. i have fears that this algae will come back though. my set up is,

55gallon/190ltrs corner unit
fluval 305 external filter
x2 T5 lights on for 7 hrs a day
undergravel fertilizer for plants
rocks, bogwood
6 red belly piranhas

 

[velanarris]

Use Excel. I had Staghorn and BBA and Excel killed it off. After it died I put a few of the girl's mollies in there and they trimmed the remains off.

 

[twin_caleb]

sounds like a sweet setup...although your gonna need a bigger tank IMO...i have four and they have outgrown my 55...cant wait till i get them into my 120 after my 600 is built