Seaweeds may drastically lower PH to dangerous levels?

[K-Sci]

Originally Posted by Ray

Certainly, in S/H, the plant would be exposed to the product longer than if applied to a potful of bark, but if you only apply it once a month, it isn’t anything like using it at every watering. The ingredients are absorbed relatively quickly, those that aren’t decompose, and the next time you water, you’ll be flushing the pot anyway (assuming you’re watering a semi-hydro pot correctly).

Thanks Ray!
I have two seedlings in S/H as an experiment. I water them the same as the non-S/H except that the pots are sitting in trays of water.

-Keith