Have you tried any feed stores/livestock supply houses?? I do not know for sure but would guess that these are also used as mineral supplements for cattle, etc. It might be worth an internet search or phone call (DeYoungs in Woodinville & Sumner Animal Grub in Sumner are ones I have dealt with in the past for such things, but there are many others here locally) and you could probably get them in manageable quantities if so (ie one 50# bag). Good luck! Connie ----- Original Message ----- From: Erik Olson<mailto:erik@thekrib.com> To: gsas-member@thekrib.com<mailto:gsas-member@thekrib.com> Sent: Saturday, July 26, 2008 4:24 PM Subject: [GSAS-Member] Bulk chemicals - help! For the past umpteen years, Kathy and I have foregone the pricey "Cichlid Salts" and mixed our own formula for our Lake Tanganyika tanks. This formula consists of dumping in roughly equal parts Calcium Carbonate and Magnesium Carbonate. It's cheap, it's relatively accurate for Lake Tanganyika, and it's not so harsh on plants. Unfortunately, our umpteen year supply just ran out, and we're kinda stumped where to get more. We tried Welch-Allyn, which has reasonably decent prices on both, but they cancelled our order because we're not an educational institution. Bah! How utterly annoying. Anyway, does anyone have any ideas where one might obtain inexpensive Mag Carb and Calcite? Also, if others are interested, I might try to coordinate a group buy. - Erik -- Erik Olson erik at thekrib dot com _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com<mailto:GSAS-Member@thekrib.com> http://lists.thekrib.com/mailman/listinfo/gsas-member<http://lists.thekrib.com/mailman/listinfo/gsas-member> _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member