RC I will agree with Capt here. Use the BRS two part supplies + the Magnesium Hexahydrate flake. Use Randy Holmes-Farley's recipe and calculator and dose accordingly. The BRS may SEEM expensive BUT you are getting a lot of product for the money which leads to a lot of product to dose. A gallon of each of the two parts + the magnesium parts will last a long time in a 29 gallon frag system. You dont need to get ultra-high tech to be successful with this system either. You don't need a dosing pump but could use one if you are forgetful or arent home every day. A graduated cyliner would be ideal but a measuring cup would be suffice. One thing that would be really nice to have IMO is a medical grade heated stirrer as the alkalinity part is extremely hard to keep in suspension, that being said its still not necessary.
Maybe Capt will have a tip for keeping that part suspended?