[arvin555]

Thanks for the explanation Poweramps!

Okay, I take it that the same or at least similar explanation is the reason why people don't use Clay pots for potting CPs? Because it really does have Mineral buildup? Wonder if I soak the clay pots in slightly acidic water (say acetic acid) might that dissolve the minerals and allow them to be flushed before using? Just so we are still on topic, might this thing work with burned earth too?

TTFN
Arvin