once you've add ya nutes to the res check the ph and if needed add ph up or down as required,then ilet it run for 30 mins and check again..
i check once a day until i kno where its going to be roughly but i still check daily ya pH will probably drift after a day or 2..start at 5.8 and don't go over 6.2..
gluck some 1 else will be along soon hopefully they will chime in..