Let's play "Guess the missing nutrient"!
I've got a 55gal Carbon-supplemented tank, fully cycled. New to EI, about 3 weeks. Many new plants added at that time.
1/4 tsp KNO3 x 3
1/8 tsp MKP x 3
1/8 tsp K2SO4 x 3
1/4 CSM+B x 3 (alternate with macros)
10mL Excel daily
1/8 iron (DPTA) on non-CSM days
My hygro old leaves are falling away due to the new tank transfer, which I expected, but they're curling. Potassium?
My (sword?) has dark veins and a dark almost-texture to them.
My stem plant (what is it?) keeps losing tips, mostly on old leaves but still strong presence on new.
Okay, what're your guesses?