What do I purchase?

[lroberts]

I am not sure whay I need to purchase here.
I just setup my 5 pound CO2 tank and purchased the Milwaukee Co2 MA957 Regulator Set and now I am purchasing the SMS122 pH conntroller found here....
http://www.aquariumplants.com/Automated_pH_Co2_Controller_MILWAUKEE_SMS122_p/sms122.htm

And it says "NOTE: Don't forget to order the buffer solutions for calibrabrating"

I am not exactly sure what buffer solution I need for this.
Is this it?
http://www.aquariumplants.com/product_p/buff.htm

And if so what is the difference between the bottles and Sachets?
I mean can I use either one... Why does one cost more then the other?

Also I have hard water however my Discuss were raised in this type of water and are used to it.


Thanks!

[cyberhog05]

you only need the 7.01 solution. The price difference is due to quantity bought. Thew sachets are little foil bags. Do yourself a favor and get a drop checker as well. Its just for a little more piece of mind. Before you go hooking anything up please do as much research as possible about co2 levels and tolerances fish have to it. There is so much info to have tucked away in your head before you can do a med to high tech tank properly.