So here’s a helpful chart for hydroponics ph with cannabis.
5.6ph-6.2ph is what 9 out of 10 hydroponic growers will run with 5.8ph being the sweetspot.
The “ph perfect” technology claims that there nutrients is bio-available way below and above that range, i think their claim is anything between 4ph and 11ph or something like that.
But I totally can’t wrap my brain around how it works as it goes against every thing I’ve read and experienced, but I’m not a biologists 
I use these.
Does not get any more simple then a tried and true 1 part nutrient powder.
General Hydroponics is the OG of nutrients and works great.
Check out my journal and see how good it works 