Awesome. ThanksYou did the right thing. The burned tops show too much nutrients in the soil. Next the roots get blocked so flushing (leaching) the pots with fresh water is the best thing to do. But once the runoff is acceptable amd lowered it is important to add back a low to medium strength mic of a balanced complete nute. Then they can continue on with at least a ninumum of what they need for best results.