Anubias Turning Brown

[BETTY BOO]

both my anubias plants have brown stuff on the leaves.i leave my lights on for 8-9hrs a day.temp is 24c/25c
im dosing with tetra plantamin fert.the lighting is 40watts.its a 125 litre tank.

is it just algae?? should i reduce the light time?

 

[stu40]

pic?

 

[BETTY BOO]

heres some pics.sorry not got the best camera

 

[stu40]

if its like a brown 'dust' then it'll be diatoms.Does it rub off easily?
Has the tank been running long?
Diatoms don't last too long
You must be doing something right for it to flower

 

[BETTY BOO]

tanks been set up for 4 months
yes it does rub off easy.
should i clean the plant or just leave it??

 

[stu40]

just rub it off.don't know how long it takes to clear up, but it should.
just keep on top of it.If things get worse, then maybe reduce the lighting a bit
Oto's & Amano shrimp love it, but if you don't want to keep them, then adding them to sort out a short term prob seems a bit unnecessary