The Meter: just go on line and googlw the Make and Model there should be some info online about it.
The cheap way to calibrate it- use disstiled water, should have a pH 7.0
The right way would be to go and buy some calibration solution. When you find the Specs for it online, it should say what pH calibration solution to use and all that good stuff.
The PH Up, You might as well just leave that on the shelf. Your really only going to need pH Down. The nutrient solution is allways gonna wanna rebound to pH 7.0, go back to the pet store and exchange the Up for Down....
The German instructions are no big deal.
Take a gallon or two of water. Measure the pH. add 1/2 teaspoon of the down. Measure the pH (give it about 30 minutes to stablize). This will now give you
a ball park Idea of how much pH down you need to add to your nutrient solution to lower the pH to like pH 5.5 or around there pH 5.0 is ok pH 6.5 being the high side of where you would like to be with your pH. If your water is with the pH, save the water for later you can use it to top off your Res.
when you mix your nutrients you want your H2O to be pH 7.0. The nutreints will lower the pH. So after you mix your Nutrients and measure you pH it should be a Low Number. over the next couple of day the pH will rise. When the pH gets to around pH 6.5 or so Lower it to around the pH reading you got right after you mixed your fresh batch of Nutreints.
