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My water tests;
CaCo3: 7
Mn: .3
Fe: .2
TDS: 110
pH: 7.5
I'm assuming these measurements are grains per gallon, but it doesn't say on my test ='/
My water tests;
CaCo3: 7
Mn: .3
Fe: .2
TDS: 110
pH: 7.5
I'm assuming these measurements are grains per gallon, but it doesn't say on my test ='/
You have 110 parts per million total dissolved solids, the vast majority of which is CaCO3, also known as calcium carbonate, also known as plain old blackboard chalk.
That CaCO3 is making your water slightly alkaline (pH 7.5).
7 grains of CaCO3 per gallon is right on the edge of being considered "hard" water, but it's not bad. The good news is that you won't need to supplement calcium.
If I were you, I'd try just going ahead and using the water as is (i.e. not deionize it or go buy RO water), adding the nutrients (assuming you're going to use something like a three-bottle fertilizer, like General Hydroponics FloraSeries), letting it sit overnight to equilbrate (i.e. let the minerals in the water and the buffers etc in the fertilizer interact and stabilize) and then adjust the pH down as desired.
General Hydroponics does make a special version of their FloraSeries fertilizer for hard water, but that's recommended for 250 PPM TDS or higher, so at 110 you should be able to get by with the standard formulation.
By the way, if there's a particular brand you're interested in and you have questions, you can always call or email them. I have had good luck with that with GH and Advanced Nutrients. Since you are one of the rare people who actually has the data on his water, I'm sure they'd be able to give you a really solid recommendation.
But again, moi, I'd just jump in with what you've got. I'll bet it works fine.