Flush it again, VERY WELL, with plain tap water at 6.7 and NO EPSOM SALT! You've scorched them, between pre-ferted soil, regular ferts, and epsom salts, and the heat will definitely make the symptoms show worse.
Use the flushing/pH instruction stickied at the top of the problems section. You've gotta get that extra magnesium out of the soil pronto. There's another trhead going in the problems section (prettykitty) with the exact same issue.
stinkyattic Reviewed by stinkyattic on . heat stress? E-indoor E-soil E-specific medium huh? CSL-Soil type/brand- miracle grow moisture control SCL-Anything you have added to the soil-per lite SCLR-Soil or slab runoff pH- was very low at 6.2 but i fixed it today and got it up to 6.8 E-Water source-sink and let it sit for 24 hours E-Source water pH around 7.2 after corrected E-Age of plant- about 2 months E-Type of fertilizer-fox farm Rating: 5