So I tried lemon juice and found that it works, but not very well. Had to squeeze a lot of lemons for only a couple points on the meter. So I went back to the hydro store and picked up some ph down which brought ph down to 5.9 - 6.0 very easily. Systems running for six days now no real problems. Plants are in seem to be ok, maybe too early to tell. The ph does seem to be rising a little since plants were introduced to system, had to adjust acordingly. Think it's from the hy droton. Does this balances out or is it constant thing all the way through?