So who really uses the 80$+ lab grade?:) What does that afford us? Salts tend to be very pure and also have other salts that are useful in trace amounts as well. Regards, Tom Barr -------- www.BarrReport.com -------------------- m2f -------------------- Read this topic online here: http://forum.aquatic-gardeners.org/viewtopic.php?p=1433#1433 -------------------- m2f -------------------- _______________________________________________ AGA-Member mailing list AGA-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/aga-member