OP stated their tap pH is 7.2 - doesn't get much better than that for tap water and the addition of nutrients to it should have it pretty dang close to a good pH without much fuss. [And 200ppm is also pretty moderate (better than my tap).] But that pH and ppm doesn't qualify as hard water and I wouldn't run a "hard water" geared nutrient line with those stats and be happy I had great tap water.
But going back and reading the original post I just noticed something: OP you started by saying you were new to hydro and ended by saying you were growing in a soil mix... what exactly are you using? Are you measuring run-off?
The full story is I purchased some quality seeds(13 seeds) and killed 11 of them by wrong germinating method,couldn't prepare well the rockwool cubes (rockwool here comes in as slab and use knife to cut,"fire insulation").So my plan was using hydroponic(i will list what I prepared to let u know) then most of them died and switched the last 2 seeds into soil to get clones later !!! Can call it as a commercial grow is ok,because that is my main target ^^
The 1st time to hydro so i list all the things I got below to everyone know how I prepared for a big battle :
tds pen,ph pen
Rh,co2,temp meter
CO2,sealed room (no air or light leak at 97%,not bad for a noob huh ?)
ventilation for two areas (mothers and flowering room)
Sulfur evaporator
ozone generator and 4 inc filter+Ipower fan to control odor
dehumidifier (20l/day)
1.5hp <=> 12000btu ac
4 600w hps for SOG style and one 600w hps for mothers
Ebb n flow system are DIY
I use all timer and don't use thermostat untill have more money to set the grow room to another level
I read "Al B fuct",got two books here by Jorge Cervantes,Mel Frank.
Most of things were Imported so have to think before making an order or just throw the money out of the window !
P/s : The rockwool I got here is industrial grade,many ones said that couldn't use but my bag seeds can grow on ?!? But I can't control for whole routine,if it works for seeds and doesn't work for clones ?!? So I am growing by soil rite now but always try to do in hydroponic through searching and learning,I also spent time on searching "how to transplant from soil to hydro",hope it help.