How do i achieve that baking soda?
I don’t understand the question Growmie 
Are you using a TDS meter to check PPM when mixing nutes ?
Yes i am
Its an expensive meter from the municipal heres water company
Bring the ph up with what?
Baking soda. Add a pinch, mix it up , and check your ph again.
Good deal , also check PH after mixing nutes. The nutes will drive PH down , add a little ph up too get back to sweetspot
6.5 PH before feeding. Happy growing 
Which and how high?
Asking for a friend.
Thanks.
They got you covered.
Apera 60EZ for your best time with PH for IN and run-off.
Hlg 260w qb v2 full spec,about 18"