Jimster
Supporter
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- 263
I echo your observations. I've used Promix for over 3 decades and I bought my 1st Ph meter last year, as well as a chemical Ph test. They both indicated right around 7. I use tap water exclusively, which is medium hardness. Promix has worked very well for me over the years, but perhaps the local water conditions keep things in balance. It DOES shrink away from the bucket edges towards the finish, but not enough to cause any problems other than not holding as much water, which might be decreased by the near root bound condition at the end.promix bales have 2 kinds of lime added. Calcitic and dolomite. With any reasonable tap water the ph of the medium will self buffer.
I use moderate alkalinity well water with 150 ppm mineral content and 8.0 ph and never need to adjust the ph of water only or a nute mixture.