Black leaves? deficiency or mold?

2 of the pictures are with flash what is this?

good pic of the main of it. I harvested the top bud as trichs appeared to be going brown or amber.. I think i may have trimmed some of the black of off other leaves. P.S (this was here before i did this) could this be a deficiency or ph issue or could it be mould or algae? i have had some kind of what my parents have assumed to be blue green algae on our lawn. It looked like black bird poo from a distance but it was green coloured and slightly see through on inspection. looked like a slimy egg casing but not hard... sort of like a olive skin? is it an olive im thinking of? im not sure. anyway any help tips advice etc all appreciated! Thanks

Also in the pictures below is som of the newest growth. What deficency does this look like? im thinking its the same thing causing the black on the other leaf but not sure? added another pic for comparison

Any help appreciated !

Looks like phosphorus deficiency.