This is terrible to admit, but I have not tested my pond until last night, not even the tiny tub pond I made last summer. So I held my breath and dipped the tubes last night after UPS delivered my kit. Aaaaannd - Everything but the Ph was at or nearly zeros. The ph was like 9 though, and still at 8 again this morning, so not sure what to do about that. But at least I can stop imagining that my goldfish are gasping in desperation, instead of just cruising around testing plants for snack value. All the other pond fixins I ordered arrived this week too, so now I can muddy the waters, so to speak, by repotting plants, adding a cool old well spigot for my waterfall, making a better dripper for the hummingbirds etc.