i was planning on that. I am going to measure out for example 1 gallon of RO water and put a line on my bucket so i know where to fill it every time and put another line where the tap water needs to go.If you start blending RO with tap water for pH don't forget that pH is a log function not a linear. I think I would make trial mixes in a jar and measure them the next day for pH. That way I would know where I was trying to go with the blend.