I would say a calcium deficiency (from the distilled water) ... don't use distilled water ... add Cal-Mag+, 10ml per gallon, and change water sources ... distilled water has all minerals missing - calcium, iron, magnesium, potassium, sulfur, etc., etc . ... tapwater is usually OK, just let it sit out overnite, the chlorine dissipates ... check the pH, and there ya go ... your soil looks pretty compacted, next time, add more Perlite, and fill the containers, close to their tops ... good luck ... :smokin: