Starting my 4th week of flowering and my PPM is around 550. Each week I have added a little more nutes and when I empty the res the PPM goes down about 35 PPms.... Should I just keep gradually raising the nutes each week??? Also the drop in ppm from the start of the new rez change to about 6 days later is because my plant wants more nutes right ??? Is the 35 PPM drop a big deal?? I am at about 40% nutes using general hydroponics, should I go up to 50 % nutes next week ?? Or am I ok ??