Alkalinity ~ 6 on Elos, ~ 6.5 on SeaChem. Bumped up the ESV a touch. Here’s a photo. Same as I remember, one looks like mustard. Only gave it ~2.5 / 3 months the first time. The supply below should be fine for a few months. I’ll re-order once I see how the dosing schedule turns out – waiting to hear opinion from Prodibio re: dosing ideas. But my last email from them mentioned MACNA and a new line of nano sized product. Right after I had ordered new…. of course…