I have mixed separate liquid solutions of N/P/K. I add 5ml of the N solution and 5 ml of the P solution, plus 10ml of the K solution each time I dose (based on what ppm I want each solution to add at the time I dose).

Can I just dump the three three separate liquid solutions into one container, then add 20ml of the combined solution each time I dose?

Or does the math get more tricky when computing what a composite solution is adding.

thanks,