Ph question

[FLOPPYFISH]

How can I maintain Ph? I read that you can use (Arm n' Hammer)baking soda to do so. But how much would I use? I have a 20g but with all the LR and LS its probaly 12-15g's of water. Also where could I find the pickling lime(Mrs Wages pickling lime) I've read about as a Kalkwuaser substitute. As I don't have much money I would like to go these routes instead of the pricy LFS brands.
Please reply quickly. Much appreciated, Matt

 

[SPC]

Matt, I have found that Kalk is the best way to maintain my PH. You can find the pickling lime (I use Balls pickling lime) at Wall Mart.
Steve

 

[randy holmes-farley]

I assume that you are really looking to maintain alkalinity, and not just pH. There are lots of ways to supplement alkalinity. First, get yourself a test kit. Then read threads on all of the various ways of supplementing calcium and alkalinity, and decide which ways are best for your particular tank.