Thank you for the reply. Here is what I can tell you. I use tap water, let sit for 24hrs to evaporate any chlorine.PH down to approx 5.8 (May be a little too low) add advanced nutrients sensi grow as well as come cal-mag. It has been in a small shallow pot for at least a couple weeks and I only just moved it into a deeper solo cup.
Other then it being a late popped seed and the only one I still had in the small shallow pot (all others moved to solo cups due to not having a light at the time so they got leggy and needed to put them in something deeper) they are all given the same light and feed.
How old is it... About 2 weeks-ish by the looks of it?
Unless your growing in straight coco, you shouldnt really need to be feeding very much rn (if at all). Most soils have trace nutrients in it which should be able to last a good 3-4 weeks depending on quality.
If you do need to use nutrients though, be sure your using 1/4 strength for now. For reference, I have a plant that's going into its 6th week of veg.
First time I fed was @ 4weeks from seed, and used a 5mL per L of Alaskan Fish Fertilizer, and have continued to feed that amount once per week since, and only now, is my plant showing signs that it needs a bit more. So just be careful with how much your feeding so soon.
Also, as far as pH goes, if your in soil, pH should be between 6-7, whether your feeding or just giving plain water. Hydro is 5.5-6.5.
You can get a cheap RO filter that screws right onto your tap for like 50$, or you can just buy purified water.. can fill a 5gal container at walmart for like 1$. Would be better for your plants to have a more pure source of water. Tap water isnt terrible, but isnt the nest either, especially depending on your locality