The other thing I have done in tanks in which I wanted more hardness (African, and salt water) is use saltwater aquarium sand (crushed coral and shell typically). You can also add an oyster shell or two - not as quick to dissolve I think but potentially a better look. On Apr 23, 2009, at 12:27 PM, Betty Goetz wrote: > I usually buy them in little boxes with 2 bones inside and typically > break > the bone into bits (like 8 pieces). I only toss in one piece and when > that's gone, toss in another. But I have small tanks so putting in a > whole > bone seems 'too much'. > > Betty Goetz > > _______________________________________________ > GSAS-Member mailing list > GSAS-Member@thekrib.com > http://lists.thekrib.com/mailman/listinfo/gsas-member _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member