i should also mention my PH has been all over the place. I check it and it sayd 6.8 to 7.8 and then add PH down and get it around 5.3. the next day its up again. The PPM is all over the place as well. One time i check it and it says 600 then again check it it says 1400. I was using well water that i lerned was fulll of nitrates and contaminents. I have switched to RO water and am currently flluching the table with straight RO water only, no nutes.