Crispy browning leaves

Judging by the color of leaves and marks pus size of plant. This could be from not enough run off. Plus I think you plants want more potassium and phosphorus. The other thing I see cause this is they get too dry at times.

Looks familiar. The little glimpse of your plants that i got i noticed that you've got a bit of leaf tip discoloration and burn. I had a similar problem with 1 of my plants recently. I flushed the medium with 6.4 pH water and the problem stopped dead in it's tracks. Keeping your pH consistent is important. If you water in 6.2 pH you should always water in 6.2 pH. Consistency really does make a difference. Give your affected plants a flushing with pH adjusted tap water. Water enough so there is runoff out the bottom. Then put your plants back in the space and leave them till they dry out so the pots feel light, but don't let them wilt. Then feed with 1/2 to 3/4 strength nutrient mix.

Browning and crisping of leaves can be caused by various factors, including nutrient deficiencies, pH imbalances, or even overwatering. Make sure you're not over-fertilizing, as it can lead to nutrient burn. Check for proper drainage and avoid waterlogging the soil. Consider adjusting nutrient levels and monitor pH consistently to ensure it stays within the optimal range for nutrient uptake.