Black "Hairs" - advice please

Hi Plant Guru's

First tnank complete newbie. Changed form fake to real plants about 4 weeks after starting up. PLease see my signature for full list of plants.
On my Laeliopsus I have black hairs :huh: growing off of it. I don't have these hairs growing anywhere else and my shrimp keep most of the decor relatively alga free
Questions - is the hair an algae?
anything that likes eating this black hair stuff?
Should I remove the plant and all runners it's put out - not desireable as i love it!
Ammonia - 0
Nitrate - 0
Nitrite - less than 5 (as accurate as test goes)
2 x Hagen fermentation CO2.
other info: I recently reduced surface disruption form the filter to lower PH and increase ammount of CO2 in the water. I htink this is cause but my plants and angels are loving the water conditions.

Any help would be greatly apreciated. Please check sig for my fish list. I will be moving all but the danios into a 100g at the end of the month (new Juwel vision 450 bowfront). :dance:
Thanks in advance
Chaz

hi happychem
as usual thanks for speedy response.

hairs are individual and look like v small arm hairs! they only affect one plant - do you mean dip the plant in 25:1 water:bleach?

PO4 - have test kit (Hagen master) so will check tonight and feedback

I think I'm going to upgrade to a presurised system as I have altered output of CO2 twice now (think it was you who told me how actually!) and it's making no more difference than when first running. I will have another play with diffuser tonight to see if there are any blockages etc restricting flow of CO2.

to be fair my LFS said it was quite a demanding plant and would be a stretch in my set up (enhanced std lighting with reflectors but that's it) but it was doing quite well.

Thanks for advice. I have a free sample (with CO2 system) of iron based supliment (brown liquid) again from Hagen. Would that help?

thanks
Chaz