Calcium Deficiency?

I appreciate the quick answer @esoteric_growing. You might have missed that this is per gallon not liter. I’m doing 60% of the recommended dosage in the bottle. You think that is still too much? If you look as past weeks plant has bounced back from serious under feeding. I also water with RO which is why I was worried about Ca def. I did 60% FF Cal Mag last water yesterday that was the first time.

I agree with the comment below!

I would bet money it’s some sort of lockout or over fert due to the 10ml of big bloom and 14 ml totally feed per L. That sounds like waaaaay too much. What EC or ppm is that? As a example I use about 2.6ml of total nutrients per L in plants that are larger than that under a 600w light. Plus the burnt tips indicate there is a excess of something being fed. I would flush and then go back in a lot lot lower with the feed. I would remove additives and just go with what ever the base feed is.