If you want to leave it on nutes a bit longer just leave it till one week out and then run regular ph clerex or flora clean for a week I have even gotten good results from five days I agree with you though dwc is a rewarding way to grow I recently swappend to aero but am not overly impressed yet...
I did notice you needed to use a higher than usual percentage of nutes I am happy with using CNS17 with Blast Off Silica Blast and Hygrozyme in my aeroponic setup its doing quite well and the medium im growing in is Hygromite
All I can say is my trees are awfully green in the front yard whenever I get looks I just say Im cleaning my fish tank which also seems to green up my trees
I absolutely hate Liquid Gold its ridiculous the amount of money that I spent to burn a crop up just like adophis I like Botanicare and usually use Advanced for my more prize crops it is worth the extra money unlike the GOLD
I have had success just changing it every week as well as using a ppm meter and topping up ideally you want the roots to drink off some of the water to form the air pocket anyway so you would not really want to top off too much anyway