Hey Moebius...thks for the invite a while back.
I love Hempy,and it is an awesome world.
If anyone is interested here is a link to my Hempy cup grow.
http://www.highgrade-seeds.com/cgi-bin/forums/YaBB.cgi?board=cgrows;action=display;num=1333957795
I try not let the res get low or worse dry.
For those that do not know:as a plant takes up nutrients the ph will go either up(veg) or down(flower) in the nutrient res.It is healthy for a swing in the 5.5-6.5 ph range.Further out of the 5.5-6.5 range,and certain nutes lose uptake for the plant.My target ph is 6.
I do not check run off ph because when I feed I am resetting my target ph.If the plants show a problem I will ph water flush then troubleshoot,and often it is something else other than salt build up.My long term Hempy moms will receive a ph flush here and there just to extend the time before clone replacement.
I basicly have 3 different 1 gallon tapwater jugs for my nute line up.
1)100% nute solution:This is full strength nute solution that my plants can handle or need during certain phases of my setup.Two of the uses are to feed the 12/12 stretch/bud developement,and for clone site production for moms.
2)50% nute solution:A 50/50 blend of my ph solution,and my 100% solution.Two of the uses are for newly rooted clones,and stasis for moms.
3)ph'ed solution:Just tap water set at my target ph.Two uses are for flushing,and of course making the 50/50.
My preventive maintenance against Pythium is 1-2 drops of Clorox bleach to a gal of solution.I will use a capfull or two of 3% Hydrogen Peroxide to my watering cup before feed or flush if needed.I use these on/off,but I am thinking of using the bleach more often for times of higher temps.
I am such a huge fan of the K.I.S.S. method with Hempy,and ease of it's rewards.
Happy Hempy everyone.