I bought pool strips from Lowes, it does Ph, Ca and others says no mixing, I put a small amount like a . I had searched the internet and found that others had used these with their mares with good results so i bought them. After doing some further testing this morning (using other things) I think she's still in the 6.8-7 range I think I read it wrong... its all good though, I'm human I admit to being wrong. The way she was behaving the other day she did look like she was going to go, pacing, mushy poo every couple of minutes, there was nothing going on outside to excite her, she did everything but lay down and push lol. Since then there has been a lot of butt rubbing, and she was up and down a whole lot last night. And her belly is a lot lower today.