Thanks!
I'm growing hydroponically in expanded clay pebbles, so there's very little water retention in them; I did set my system up so there's 1-2 inches of water at the bottom of the buckets at all times but still I would not be able to get away with watering every other day.
I have looked at the calcium or nutrient deficiency but my plants seem pretty healthy; if the recent watering schedule changes won't do anything I will have to find a way to measure calcium levels reliably and see how I can address that.