I have just flushed the ladies with fresh water with Ph around 6.2, i dont have the best ph testing equipment so its kind of hard to be precis, but the first one i checked the first water coming out and that was ~5 and the last water that came out was ~6.5 the second one was ~5 in the first water coming out and the last was ~6.
All this seems like a mystery to me because the water i have been using is leaning more towards 7 i ph, and when i flushed it with the ~6.2 the water coming pout was more negative then the water i put in.
And the soil im using, i dont think that it was anything else mixed in just soil and sand, but lesson learned no more sand to the ladies. =)
One more thing i think i should add, my fertilizer do have something called ph correction, i dont know if thats good or bad in my case, but it did sound good when i bought it.