That's why you pay attention to the ingredients labels (wink). I had the most problem finding something that didn't have too much perlite, which floats so you end up netting off the surface for awhile. I have 4 - 10 gallon tanks (2 with peat/2 with potting soil) I set up and planted maybe 5-6 years ago and they still grow great plants (from my limited subset of low-tech low-light plants). I never get around to tossing in any ferts, but most have fish (mostly Endler's). Betty Goetz > The problem with potting soil is that most brands contain chemical > fertilizers. I use soil from my organic garden mixed with commercial > aquarium growing substrate. Works great. _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member