The dark period is what stimulates the female hormones (and sexual maturity). Look it up on the web. And recommended temps at night compared to day (to aid the female hormones). You might stress the plant with 24/0 (seeking out CO2 around the clock).
You're not going to effect the female hormones and drive them crazy from +/- 1-2 hrs. light. The natural environment outside is not perfect. Balance the hrs out over next few days and get it back close to your normal time.
Purified water or distilled water(?) should be neutral @ 7.0. Probably purified water. Pure Water is neither acidic or basic. You can buy Gen Hydroponics solution on ebay for $8.
The triche color(s) are what determine the best harvest time not the hair color. The THC and CBN is contained in the triches.
https://www.rollitup.org/harvesting-curing/516184-trichomes-harvesting.html
http://www.cannabisculture.com/articles/4822.html
Never remove any part(s) of the plant. 4.0 is way too acidic. pH range is 6.2-7.3 (look up pH Nutrient Availability Charts on the web). You go 12/12 when the plant is sexually mature. That means female pistils at nodes and alternating nodes. (search diagrams on the web.)
Top-right looks like it...
I can name two popular forums that are no where near as poor as this site. I never came across a site like this anywhere on the web where there is zero respect for anyone else. Guten tagen.
Brauchen leiter? Lumen? Vegetieren zwei monat mit leicht metal halide. Undt reflektieren raum. Volumen raum? Nacht und tag temperatur 16-24 celsius. Hoch pressen sodium blume reifen. Guten haben!