I still haven't gotten the K2006, and have been using strips and a simple 3-test reagent kit. I'll make sure to get the K2006 ASAP.

My pH never drops or raises much. I don't know if it's our water or what, but it's always been like this. Even after all the raining and added chemicals, my pH levels have stayed between 7.1-7.4 (it only went down to 7.1 after HEDP). I just chalked it up to good luck.

I've noticed that the stained areas appear "raised" on what looks like calcified deposits of some sort. The non-stained areas look like small gouged out rivers and lakes.

Also, for Borax I noticed you guys don't seem to have good online sources. I want to recommend a website I found if it's okay with you. I think, but am not sure, they offer commissions and new sign up bonuses ($10 off or something, I didn't get to take advantage of it) of some sort if you so desire.