Need leaf diagnosis in DWC

5 gallon dwc.
Recently switched to Lucas @ 6/12 ratio using GH micro and bloom ph 5.8
She's around 3 weeks into flower. Switched from GH 3 part flora series.
Had big ph fluctuations before switching, but steady now.
Bud growth seems very slow, but it's always tough to tell when looking at her twice a day. It's torture.
I'm not currently using any boosters or cal-mag.

After posting this I went and checked ec and ph. Forgot to mention that at 6/12 per gallon ratio, ec would drop as it used water and ph steady at 5.8.
Last night my makeup water I mixed at 7/14 because of the ec drop. But this morning ph dropped to 5.4 and ec is 1.0 (which it was at .8 when I added the hotter mix as a top off.

Your methods sound spot on. I wouldn't change a thing. I don't know what to make of that leaf though. Tap water or RO?

It's tap, but it's off my in Alaska roof. Zero tds.
Have you tried Lucas formula, if so did you try bloom boosters of any kind?

I use Lucas @ full strength.

Only additive I use is Floralicious+ and bulletproof Si.

I use flying skull z-7 to help with nutrient uptake and for the roots.

That looks like nute burn.

Do you have enough bubbles? What pump?

The leaf could have been affected from the previous nutes.
I have a Fusion Quietpower 500 pump with 2 outputs. One has a red bull can sized air stone and the other is 3/4" x 8" round fish tank stone. Running at max. I have ever so slightly browned tips since I got the clone as a gift. At the time I received it, it put it into bloom cuz she was ready. But the leaf edges as in the pic are relatively new. I posted my previous issue with ph in my other thread "low ph issues in dwc" on this forum.