Cool thanks for all the help guys and Gals.. I was mixing before hand then letting the water sit then Phing. From now on I will let the water sit for a day or two then add nutes and PH it right before use.

Thanks for the tips,,

I will be sure to discard the left overs,,,,

kd_special
kdspecial Reviewed by kdspecial on . How come the Ph will change? I have noticed that when I mix my water and nutes I will test the Ph. and bring it to desired measurement. The next day when I test it again I notice it drops a couple points. I check cal on the Oakton tester Pen and its perfect. I've read on the forums to always check and re-check the Ph again and again. Does the PhUp/Down just disappear and disolve in the water? should I even bother to set the Ph of my water a day ahead of using it,or before i leave it to sit for a few days? I use a One Rating: 5