I posted this similar question in another thread, but don't want to hijack anyones topic, so here it is again.

I tested my pond water with a nice pool test kit the other day. Nice Sunny day 72F real-feel of 76F. Here's what I got:

Hardness - 0
PH - 6.6
Alkalinity - 40
From the link ewest provided I determined a 21.24 mg/l CO2

From these results, does it appear that I should also get a couple bags of Ag Lime to toss in and around the pond?

What do you think?