Curling dead leaves

fox farm has a balance that often ends in this result. looks like calcium and maybe something else. i know they are low in calcium so if you werent' supplementing it probably needs a bit more than what comes in those FF trio bottles. if you've been light on fertilization (1 / 4) then maybe it's low on potassium too. How often you fertilize will impact the suggestion.. at 1 / 4th i'd wager you are fertilizing every other irrigation? Bump it up a little and see how it goes. i'd add some cal mag and up the tiger bloom i believe -- has teh highest K value on label? i'd read the labels to deduce how much calcium you add and let that impact the instructed dose on teh cal mag label. soils is a balancing act. take notes of what you do and how any symptoms progress... this way if it isn't right, you make a better choice next time. and eventually have a procedure that works seed to harvest within a few grows -- at least 90 % of it. fine-tuning can take longer. I see you are using epsom salt... you may need to reduce that when you add cal mag... you don't want to OD on Mg, obviously.