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Wow, you have very hard water. You're in luck though, GH makes a flora hard-water line. Its just the regular three part flora line (grow-micro-bloom) but instead of buying the regular micro, you buy the micro for hard water. That should make it easier to deal with your water, or you could always buy a reverse osmosis unit for 100$-200$ that would be your best bet.
so i take it that this water prolly has a high ppm even on its own.
does that mean less room for nutrients?
i plan on using PH down. and a ppm meter with every nute mixing. I dont mind using less than maximum nutrients, i heard the weed is better like that, just not as heavy.
Having a high ppm does not mean there is less room for nutrients. When you measure your ppm, after adding nutrients to the solution, subtract the ppm that the water starts at in order to determine how much fert to add.
In addition to the Ph down, make sure you have a Ph test kit as well, don't just add Ph down blindly.
Plants grown with less fertilizer will be no better than plants grown with maximum amounts (as long as they are both flushed properly). The only difference will be in the amount of yield you get.
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