Auto Critical Orange Punch

I think I am worrying myself more than I need too. The calicum defficiency has took over around a half of the fan leaves on 1 of the plants. I don't have much hope in a great yield from this one but fingers crossed my other 2 were caught in time. Have folder fed with a slightly more concentrated spray of cal mag and ph'd water. Whilst keeping a feed, plain ,feed schedule Unfortunately I don't currently have access to a ppm reader so can't say for sure exactly what the problem is but It seems the defficiency has slowed/stopped. Will continue to monitor.