I've always wondered about the correlation between Alk and PH. I added 500 pounds of aglime last spring and that only brought my Alk to 40. My hardness is still zero, but my PH stays around 7.4. I use a litmus stick to check Alk (which also checks PH and Hardness), but a 5 drop tester to check PH as well and the two are always at least close on the PH test.

I wish I could get my hardness up a little. Planning to throw more aglime in the near future.

.10 surface acre pond, 10.5 foot deep. SW LA. The epitome of a mutt pond. BG, LMB, GSF, RES, BH, Warmouth, Longear Sunfish, Gambusia,Mud Minnows, Crappie, and now shiners!!...I subscribe!!