Anubias spp

[NjOyRiD]

can all of them can be put on wood or rocks?
and what can of fertilizer should i use?

[BigDaddy]

All anubias sp. are rhizome plants, so yes, ideally they should be anchored to something.  Never bury rhizome plants in gravel, as the rhizome will rot and the plant will die.

Anubias are very slow growers, so ferts typically are only needed in VERY small dosages, if at all.  A liquid fert after a water change is more than enough.  In our tap water, with lower light levels, you may not even need ferts at all, the trace amounts in our tap water might be enough.

[Troy]

NjOyRiD : In my community cichlid tank I have my Anubias planted in pots so my cichlids do not dig it up. I add small amounts of fertilization after my water changes. The Anubias plant does grow slowly. 

[tuvok]

Definitely my favorite plant. The few that I have seem to be doing well with no fertilizers. They are slow growing but that just just makes new leaves appearing all the more exciting.

[NjOyRiD]

with what i can attach tem?

[mseguin]

You can use fishing line, its pretty much invisible.