Does high magnesium levels can block the potassium intake ? I did came across this link yesterday posted in rec.aquaria.freshwater.plants: http://fins.actwin.com/aquatic-plants/month.9611/msg00193.html Can anyone confirm this ? Does GH of 12 counts as well ? 10x Amit --- StripMime Report -- processed MIME parts --- multipart/alternative text/plain (text body -- kept) text/html --- ------------------ To unsubscribe from this list, please send mail to majordomo@thekrib.com with "Unsubscribe aga-member" in the body of the message. Archives of this list can be found at http://lists.thekrib.com/aga-member/