What’s going on here ?

Overfed K excess and lockouts of elements

Stop needlessly stripping leaves, and it'll be more robust to nutrient related issues. if you are using a 500-scale TDS probe to read ppms, it's probably too high. Even higher if it's a 700scale vs 500scale tds turd, i mean probe. Use gauranteed analysis lables to calculate ppms of what you add... it'll be 10x more useful than a TDS trash reading converting with 1 of several conversion factors further making the reading useless and whimsical. 1100 ppm is unnecessarily high, if it is an accurate value. Stripping so many leaves exacerbated this issue, but still early in the progression. Chlrosis on new growth hints at too much P or K, but could be other things. May need more symptoms or deeper dive into your fertilization and other behaviours the last couple weeks. fyi, stripping leaves can also cause excess stretching... the plant seeks light when not enough leaves are absorbing 'enough' light.

I grow DWC as well. Other than you stripping the plant of its leaves getting to this point, it looks fine. Try to spare a few leaves so it won’t shock your plant the next time and it will keep on growing wide open. If you didn’t strip any leaves it looks leggy and I’d suggest you check your lighting and turn it up a little at a time until you get to a DLI of 30-35. Your PH is fine.

Start a diary if you want the best advice.

Do you have an actual question? A particular issue that is bothering you? We are not mind readers. Plant looks fine though.

I'd try and keep the water a bit cooler and maybe move the light closer or increase its intensity the plant looks stretched like its aiming to get closer to the light. Some will also say PH of 6.2 is to high. As long as nothings growing weird stuff in the res or on the roots. If it is. you might need some addaditive to clear it up