Not familiar with that particular line....But I wouldnt go that route if I were you. Get/use a meter for now.Im in the same situation, and im using Canna nutrients, well from what i read, the contents of the bottle have been produced to maintain stability ie. Ph stabilizers, and nutrient strenght can only decrease so really if you begin with the correct strength you can't go wrong?
Check the other thread you made asking that.my temperature is 29 degrees celsius? is that too hot.... shouldnt be should it? i know i read lots about optimum temps and humidity but the sun ie. the correct lighting and water are the main desires of a growing plant?