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If the ppm you claim on your week 3 are true,then I would say it's nutrient burn!!

Just give any full fertilizer, like anything with npk and other micros. It will be fine. Care with pH or just add life to soil (bokashi) and water less if you are a fish planter.

What I believe you're looking at is a sulphur deficiency ... the yellowing starts at the base of the leaf and extends outward, correct? This is a micronutrient which won't be corrected with the addition of more grow nutes... the cause is likely a PH that is badly out of range... sulphur specifically can be absorbed by the plant if the PH is at minimum 5.5 but optimal is 6.0. Are you adjusting the PH of the water/nutes you're giving her? Have you tested the runoff to see what that PH is? This is critical to a successful grow! At bare minimum, you need to have some PH test strips that you use every time you water/feed... I've found, though, that these are really very inaccurate. I used them myself in my early grows because I couldn't afford to get a PH pen - thought my tap water was 7.0 with them but now I have a PH pen, I realize my tap water is actually 7.6!!! Scrape together the money and buy a PH pen - you won't regret it - I like Apera (cheaper than Blue Lab and probably an even better pen)... and then get your PH into a good range for your plants (6.0-6.5). This should solve your problem.... Good luck!

I’d suggest perhaps changing your nutes altogether. There looks like there’s one or more deficiencies . So you have 2 choices identify which deficiency your plant is showing using the symptoms of the plants then purchase supplementary products to remedy the issue or go with a another brand that’s more “complete”. Also how’s your wet-dry cycle that greatly affects the vigor of the plants growth as well as greatly controls fungal gnats . Fungus gnats & soggy anaerobic root zones spell lead to root rot & that’s trouble through and through .

could be nitrogen deficiency, but also something as simple as over watering..