Not an expert here and definetely no idea about growing in hydro but if it's cal issue, why spray with epsom which is MgSo3?
no calcium just mag Nd sulfur
Yeah LED, guess I never thought about that not actually containing cal... you usually see the deficiencies in pairs haha so Epson salt is the go to...
I think you led is increading the demand, mine always show this same deficiency around this age but as they get bigger they seem to out grow it
I sure hope it starts growing out of it lol
yes the SF has one of those more demanding spectrums, 50% might still be strong for small little leaves that's a powerful light, I've kept my dimmer on my 1000 to 25% to prevent this but they slowdown abit so not sure what's worth it, perhaps more balance is needed im actually switching to MH because when they go into the flower room to HPS its like pow way to much light
Def more cal & magnesium. Even the booklet says you may need to give/ or may want to give more calmag.
So you think they're perfect? Lol
I've checked the bottom of the leafs and haven't seen anything alarming
