brown patches wavey leaves, cal def?

hey folks got these brown patches coming up on some lower leaves
also some plants looking limp and wavey should i start adding some calmax?

last feed was
3ml a+b/4ml
10ml rhizo/4ml

ive posted some pics in my diary today (see sig)

where are the brown patches? tips? all over? small? big? do they start as yellow circles and turn brown? are they dry and crispy?

nick17gar said:

where are the brown patches? tips? all over? small? big? do they start as yellow circles and turn brown? are they dry and crispy?

Click to expand...

hi nick, yes they start small yellow and go brown. some tips have tiny black spots and are going crispy
ive uploaded pictures in my journal, will get try get a better one now

heres a pic....