m0useanswered grow question a year ago Looks like your medium is locking out things from not enough runoff and to much salts, Foxfarms also advises you to feed at a concentrations that will 100% cause issues down the road, They do this because they want you to buy more of their product. Best if you invest into the EC pen and dilute your solutions EC down to the desired amount to prevent this. Run off is key in preventing buildup.
Everything else looks on point, RH, Temps, Light schedule and DLI.
Good Luck!