Protea Chemicals, Wadeville. tx a zillion Tumbleweed. also in Pretoria - so probably everywhere Protea Chemicals Pty Ltd Silverton, Pretoria Address: 148 Conveyor, Silverton, Pretoria - 0184 Phone: 012 804 9646 I use it to increase TA in my pool as it only has a small effect on the PH...been paying...