You know, my plants have been growing in straight alkaline soil and water the entire time. I mean it doesn't even make the needle move. Which sits on 8.
Your lock outs are likely due to your very high pH. The absorption of the various elements happens at various pH levels but optimally at much lower ones.But then the reason I flushed it was because If I had lock out of minerals building up from not having proper run off or some other type I thought maybe it would help it.