Ph perfect from advanced nutrients 3 part with voodoo juice over drive and terpinator it adjusts with coco coir so i dont see why to mess with it and just ph water feedings?
May ajust your PH it around the correct range but PPM is different mate. Your TDS is the strength of the nutrients.
I personally do not use AN due to the hype, price and how they overmarket to new growers, but anyways.
You should get a PPM meter and generally what they say on the bottle 1/4th strength for small plants and go from there.
never start at full.
Anyways, I suggest a PPM meter always if you can get one.
I dont go without one. ALl up to you, but take everything AN says with a grain of sale same goes for other PH perfect solutions.
Regardless of the PH you still need to know how much your giving and at what dosage in TDS.
If you afford it get one.