Just wanted to say excellent journal, thank you for posting this. I had a couple questions about your ppm readings.
1. How are you able to tell if the plants are absorbing the mix? Seeing that rockwool is so absorbent wont it take the solution up regardless and then it will be up to the plant to take it from that? I guess what I am asking is if the ppm's rise after a water cycle is that an indication there is a lot of evaporation or plants not uptaking the nutrients. I just wouldn't think you would be able to tell if the plants were taking in the nutrients because the rockwool absorbs so quickly. Curious about your thoughts on that.
2. Did you ever implement the automatic top off? Would you still recommend adding this? I just wonder if you would have to constantly adjust your nutrient ppms or would it balance out with evaporation?
1. How are you able to tell if the plants are absorbing the mix? Seeing that rockwool is so absorbent wont it take the solution up regardless and then it will be up to the plant to take it from that? I guess what I am asking is if the ppm's rise after a water cycle is that an indication there is a lot of evaporation or plants not uptaking the nutrients. I just wouldn't think you would be able to tell if the plants were taking in the nutrients because the rockwool absorbs so quickly. Curious about your thoughts on that.
2. Did you ever implement the automatic top off? Would you still recommend adding this? I just wonder if you would have to constantly adjust your nutrient ppms or would it balance out with evaporation?
Notes:
Week 8 - beginning of Week 6 in flowering (May 14 - May 21) notes
PPM readings remain within 10% of original value throughout the week, indicating that water evaporation is not substantially altering concentration of ions from the nutrient salts in the reservoir. Also providing a strong indication that plant absorption of reservoir mix is increasing. No fresh water was added as dilution was not required.