what buffers to use?

[Wayne]

For the south side I would send you to Big Al's or Blue World Aquatics.

Big Al's has more selection for whatever you need, but Blue World is 100% Saltwater so its a good one to check out aswell. Both are similarly priced. Chemicals vary so much from about $10 - $40 depending on size, quantity and type. You should pick up test kits for whatever you are dosing thou so add these into the price of the chemicals.