Fully Automated Rez

Hey all,

So here's my question:

Is there a way to automate the maintainance of a netrient and h20 rez via the use of solenoid valves or something similar?
ie. when pH is too high, the pH meter sends a signal to the valve adding a small amount of pH down, another reading is taken, process repeats if nessessary

any ideas? any electromechanical engineers? haha.

I have always been interested in this... subscribed!

If you look at C.A.P. they got some very interesting hardware involving automation, however its in the $1000s for their lower end automation systems...

now we just hope someone smart responds right?!

The smart way to to it w/o the masters degree would be it use a simple gravity feed IV drip with a manual control valve.

If you keep proper records you will know how much solution will be needed in a 24 hour period.

Take the amount of ph down needed mix in a solution of 128 oz of h2o with some h2o2. Play with the control valve to put out 1/2 oz per hour and walk away for 10 days. If you read between the lines this might be a way to take a weeks vacation w/o a babysitter. Make your amount of solution the amount of water needed on a daily basis for replenishment.

Speaking of records I demo'ed most of the free/shareware grow apps and they sux.

The best record keeping method I have found so far is a simple spreadsheet.

Here is a template you can also modify to fit your needs:

http://dopediary.com/2010/08/spreadsheet-marijuana-tracker/