Thanks guys probably just chalk this one up to bad timing on feeding but to be on the safe side I'll grab some recharge and cal mag
Little Epsom salt is all you "probably" need. Them top leaves that look like magnesium deficiency is most likely a Manganese deficiency. They both look alike. How can you know for sure? Magnesium deficiency starts at the bottom up ...Manganese starts at the top.
The thing with Cal Mag is since you topped dressed already, your adding Calcium in addition to the Calcium you just laid down (in the top dressing). Too much Calcium can block Magnesium, Boron, and Phosphorus.
The key here is balance so be careful.
It's a tuff act and when in doubt just flush your pots when you see trouble.
One important and overlooked factor is your soil. I'm assuming your growing organic since your using Gaia Green. Check your soils pH. It needs to be within a range for your plant to prosper.