^Thanks.. I'm familiar with that chart.

I'm still not convinced that runoff pH is consistently a reliable indicator. I don't think the pH of my soil swung 1 point in the last 6-7 days, whereas the runoff did. Nonetheless, I do think it's a good "tool" and I'll continue to check it.
lampost Reviewed by lampost on . Soil runoff @ pH 5.0!? How did this happen so fast? OK, well I found out what the cause of my problems were. I posted about some curling/canoeing leaves and some brown/rust spots I was starting to see on a few plants. I decided to flush and the initial runoff was pH 5.0! I was using distilled water to flush (pH 8.0) and then switched to pH'd tap water (pH 7.1). Anyway, I flushed the 5 gal container with about 4-5 gal. I ran out of time in the light cycle or I would've flushed more. But I only got the pH of the soil runoff up to about 5.4 Rating: 5