For you folks that signed up to learn DWC I've got news. There was finally something to do today, reservoir changes. It's only been seven days since I did the first one this grow, but the temperature extremes this weekend have me wanting to empty the buckets and start fresher. If you missed it earlier, the reservoir temperatures were 80°F this weekend due to an hvac malfunction and wood stove.
The real quick explanation on how this is done is this;
Remove the netpot containing your plant and set it onto an empty bucket.
Take pH and ppm reading of the solution in the bucket. Write them down.
Empty and clean the bucket.
Fill the bucket with 4 gallons of fresh water that has had time for the chlorine to evap away.
Take a ppm reading of the fresh water. Write it down.
Add your nutrients and other additives you wish to use. Write down what amounts and what you use.
Make sure it is mixed well.
Take pH and ppm reading of the solution now in the bucket. Write them down.
Replace the netpot and plant on the renewed reservoir.
Notice I said ~Write It Down~ Note taking is an important part of DWC. If you trust your brain to keep these numbers and the ones from the previous week, well your better off than I am. I'm old and can't remember squat. The notes help me remember what my nutrient mix is. I compare that to how well my plant is doing and it gives me an idea of what to do next time in regards to feeding.
Since I did all this this morning for three different buckets, I'm going to spare you the overflow of info and not list each one here. I will however post an example of my version of notes, with readings. It goes like this.
ppm out......835
pH out.........6.6 @ 76°
pH in............6.3 @ 68°
ppm in........900
Plain water ppm.....132
Nutrient value of reservoir....768 (this is derived by subtracting the plain water ppm from the ppm in reading.)
That's really all there is to it. Repeat this every seven to ten days until they are using a significant amount of water, then it is a little different. I'll touch on that in a few weeks when it becomes an issue in my garden.
Any questions? Did I skip something that needs touched on? Speak up students, as Daddy used to say "I can't hear the rocks rattle when you shake your head, speak up."