ph what should i do!!!!!

what should my ph be at right now im using tap water and want to start phing my water i am currently on city water also how should i ajust my ph i dont know what to use or what would be harmful to my plants. thanks

Soil and soilless mixes should aim for pH of 6. Hydro growers should go slightly lower which helps prevent pythium and other root rots-- 5.5 to 5.7 is ideal

i am growing hydro what should i use to lower and higher the ph

You could go to locall hydro shop and buy PH+ and PH- and add as needed..

Or for cheap...
Alot growers use VINEGAR to lower the PH of their water..
It only takes a couple drops to lower the PH substantialy

If your PH is to low, add Baking Soda...
Baking Soda has a PH of about 8.1