hOW NECESSARY IS IT TO HAVE A TDS METER BEING THIS IS MY FIRST GROW? cAN I GET AWAY W/O HAVING TDS AND PH METER. iM GOIN TO PURCHASE THE STRIPS AND THE PH KIT FOR NOW. I DONT REALLY WANT TO BUY A CHEAP ONE AND ITS NOT ACCURATE. U KNO U GET WAT U PPAY FOR SOMETIMES.