Day 89 - pH thing has been quite steady the last few days, but I think part of the reason is I have been keeping it over 6 (between 6.1 & 6.3) which makes me think it may not be able to feed on something so keeps pH stable (This pH issue could be root acidification with too much Potassium; it seems to coincide with the PK Warrior being added - pH needs to be below 6 for Potassium uptake to happen so I artificially blocked it by keeping pH above 6!!!). EC also going up but not as quick as it was...drops back further than it was when adding RO water (i.e. if it drank 10L and EC went from 1.7 to 1.9, adding 10L back takes it to 1.6).
So, as I have been promising myself for the last couple of days, I did a full tank change. Have dropped the feed substantially for the start of week 7 (Which is technically Monday coming). New Nute Strength:
Silicon - 1ml/L
Sumo Boost - 2ml/L
Bloom A - 1.2ml/L
Bloom B - 1.2ml/L
PK Warrior - 0.4ml/L
Sensizym - 2ml/L
Fulvic - 2ml/L
EC 0.8, pH 5.9
Did have A & B @ 1ml/L but EC was barely 0.7 (Background EC of water is 0.2) so added the touch more A&B so as not to super starve them. Will now monitor pH/EC for the next few days and try to keep levels nice and even for the next 9-10 days before going to week 8 force and week 9 flush and the finishing bulb!
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Day 85 - Dayum this pH management getting funky now!!! For the last week, pH keeps taking a nose dive (0.5-0.7 a day) with water level dropping and EC rising. Can't work out what the girls are at at all. Apart from lower leaf loss due to light being blocked, the plant is creating some new leaf matter (As you would expect) where light is getting reflected down low but can't work out the pH drops. No matter what EC i set them too, or pH, they only appear to be taking on water...or something micro (Ca/MG or the likes) and leaving the macro's.
Topped up tank with some RO (Reclaimed from dehumidifier) water and only added calmag since tank change 3 nights back (It has some N in it for the new green and hopefully just gives what it needs with Ca/Mg). Apart from that, just keeping an eye on things to make sure no burn...dont want to put them on a starve on the beginning of Flower week 6!!!