Hi, due to the small size of my tank (50 lt) i dose macros via a liquid dose. I mix up enough nitrate and phosphate in separate bottles to last 3 weeks, the dry weights are calculated using the nutri-calc program and weighed using an electronic scale. The targeted values of each are 20ppm nitrate & 3ppm phosphate. If i use tap water in this mix will this react / reduce the amounts of nitrate & phosphate dosed into the aquarium? 
Tank details:
50lt
1 55w AH PC tube & 2 18w NO daylight tubes
pressurised Co2 via glass diffuser with a power head sitting on top.
Flourite substrate
Gh 5.0, Kh 3.0.
3ml flourish 3x week
50% water change each week.
Tank details:
50lt
1 55w AH PC tube & 2 18w NO daylight tubes
pressurised Co2 via glass diffuser with a power head sitting on top.
Flourite substrate
Gh 5.0, Kh 3.0.
3ml flourish 3x week
50% water change each week.
