Alright -
I've been going through some of my old notes, and I have a few different theories / suggestions.
First Theory:
Magnesium deficiency;
Magnesium deficiency will exhibit a yellowing (which may turn brown) and interveinal chlorosis beginning in the older leaves. The older leaves will be the first to develop interveinal chlorosis. Starting at leaf margin or tip and progressing inward between the veins.
Second Theory:
Iron deficiency;
Pronounced interveinal chlorosis similar to that caused by magnesium deficiency but on the younger leaves.
Leaves exhibit chlorosis (yellowing) of the leaves mainly between the veins, starting with the lower and middle leaves.
Caused by factors that interfere with iron absorption of roots: over irrigation, excessive soluble salts, inadequate drainage, pests, high substrate pH, or nematodes. This is easily corrected by adding an iron supplement with the next watering.
My advice / thought -
I think that by just using your bloom solution - your plants are missing out on valuable nutrients needed in order to compliment your bloom.
I like the Botanicare line almost as much as Advanced nutrients - and so let's keep rocking with them.
I belong to another board - and one of the moderator's -
hererisssh - has a nute schedule I really liked:
Basic Flowering Formula (1 Gallon):
Botanicare Cal-Mag + 5 ml
Cannazym 9 ml (Nitrozime is a fine alternative)
Botanicare Liquid Karma 12 ml
Botanicare Pure Blend Pro Bloom 10-15 ml (depending on sensitivity)
PH Adjust To 6.5
The Cal/Mg & Liquid Karma are going to give you the added nutes I think you are missing.
I think this is going to fix you up nicely - and get your bitches back on the right track.
I am back in the states now, and check the board often - so post up some pics and we will monitor them closely.
Let me know if $ is an issue, and I will come up with a cheaper alternative to the products.
- CHeers brother