What kind of deficiency is it? Phosphorus?

Made a whole new set up after going down the hydroponics rabbit hole…. https://www.allforgardening.com/1303501/made-a-whole-new-set-up-after-going-down-the-hydroponics-rabbit-hole/ #hydroponics

Honeycomb Pave https://www.allforgardening.com/1303479/honeycomb-pave/ #hydro #HydroponicGardening #hydroponics

My little salad pond setup https://www.allforgardening.com/1302821/my-little-salad-pond-setup/ #hydroponics

Larry https://www.allforgardening.com/1302797/larry-%f0%9f%8d%8b/ #hydro #HydroponicGardening #hydroponics

Getting there https://www.allforgardening.com/1302460/getting-there-20/ #hydroponics

Black Cherry Soda https://www.allforgardening.com/1302436/black-cherry-soda-%f0%9f%8d%92%f0%9f%a5%a4/ #hydro #HydroponicGardening #hydroponics

Tomato plant wilting suddenly? https://www.allforgardening.com/1302112/tomato-plant-wilting-suddenly/ #hydroponics

Co2 Enrichment https://www.allforgardening.com/1302088/co2-enrichment/ #hydro #HydroponicGardening #hydroponics

Purple velvet https://www.allforgardening.com/1301747/purple-velvet/ #hydro #HydroponicGardening #hydroponics

Many initial jalapenos are small https://www.allforgardening.com/1301580/many-initial-jalapenos-are-small/ #hydroponics

How screwed are my peppers? https://www.allforgardening.com/1301416/how-screwed-are-my-peppers/ #hydroponics

Strong VS Weak Light https://www.allforgardening.com/1301073/strong-vs-weak-light/ #hydroponics

White Runtz https://www.allforgardening.com/1301045/white-runtz/ #hydro #HydroponicGardening #hydroponics

First hydroponics system. Two out of three aint bad? Weak pump? Help! https://www.allforgardening.com/1300732/first-hydroponics-system-two-out-of-three-aint-bad-weak-pump-help/ #hydroponics

Black Honey Butter pheno 1&2 https://www.allforgardening.com/1300017/black-honey-butter-pheno-12%f0%9f%94%a5/ #hydro #HydroponicGardening #hydroponics

Strawberry hydroponics Y5 W32 https://www.allforgardening.com/1299854/strawberry-hydroponics-y5-w32/ #hydroponics

My mint plants are extremely large and healthy this year. It's amazing how different they are compare to last year.

I have 3 plants like this on my balcony.

Issues with starting seedlings hydroponically https://www.allforgardening.com/1299694/issues-with-starting-seedlings-hydroponically/ #hydroponics

My first harvest in my DIY bubbler https://www.allforgardening.com/1299670/my-first-harvest-in-my-diy-bubbler/ #hydro #HydroponicGardening #hydroponics