That’s a tough call, but I think your plant is showing more signs of nutrient burn than of deficiency. Deficiency tends to start at the bottom and work it’s way up, while burn usually starts at the top and works it’s way down. Your top leaves seem more affected and the way the tips are burning does look more like nutrient burn to me. On The plant CannabisMingus has going his lower leaves are the most affected and his upper leaves are showing more of a fade out than a burn.
I think I wouldn’t add anything maybe water to a little runoff and check the ph and EC. If the dots are releasing too much maybe washing some salts out of the soil could help? It’s a tough call, that plant and CM’s were both looking so great heading into flowering. I wish I could say grow dots for the win, but that doesn’t appear to be the case.