this is my 1st post on RIU!!
How often do you adjust the PH in the res?? do you do it weekly when you make the soup, OR do you drain, adjust and then refill daily?? OR do you just adjust in the res it self??
Also you may want to consider running your clones on a 18/6 rather then 24/7. My friend had 100% success rate cloneing under a 12/12 hps without hormones!!!. however it took too much time to revert to veg so ied go 18/6 rather then 24/7.... BUT BUT if you leave for days i would try to 12/12 the closet, clones and all. Im not 100% but i think it takes more time for the clones to start flowering then it would for the flowering Sour D to revert to vegg.
RECAP: I would rather expose my clones too 3 days of 12/12 then my floweing SD to 3 days of darkness/ 3 days of 24/0 light
just my thoughts for food