HELP PLEASE

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Tokeybear12

Well-Known Member
Long story short. I'm 20 days from harvest in my RDWC, I did res change 3 days ago at 740ppm, as expected it dropped to 675ppm the following day (I'm still looking for the sweet spot) I added Plain RO water to bring back up water level as a result ppm dropped to 550. Well today when taking measurements the ppm rose to 575ppm, and this makes no sense to me what so ever. ADVICE PLEASE!!!
 
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Skillcraft

Well-Known Member
I run dwc and for what I have found that works for me is add to res @ 1/3 strength at what you are feeding at. That is how I do it and it stays pretty close. May not work for you.
 
buckaclark

buckaclark

Well-Known Member
Tokeybear12 said:
Long story short. I'm 20 days from harvest in my RDWC, I did res change 3 days ago at 740ppm, as expected it dropped to 675ppm the following day (I'm still looking for the sweet spot) I added Plain RO water to bring back up water level as a result ppm dropped to 550. Well today when taking measurements the ppm rose to 575ppm, and this makes no sense to me what so ever. ADVICE PLEASE!!!
Click to expand...
Ro and Distilled water don't test well
 
T

Tokeybear12

Well-Known Member
Skillcraft said:
I run dwc and for what I have found that works for me is add to res @ 1/3 strength at what you are feeding at. That is how I do it and it stays pretty close. May not work for you.
Click to expand...
If im adding 1/3 strength, wouldn't that just lower the total ppm?
 
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Skillcraft

Well-Known Member
When I do what I said my ec stays within a 50 point range. But if ec does spike just add water to res. . But I do change res every 7- 10 days. I also run GH trio with a armor si added.
 
breedwheel

breedwheel

Well-Known Member
I always just added the same strength or plain water and then adjusted pH levels. When my plants got big in RDWC they were drinking and eating so much I had to go same strength that were in the res to keep ppms at level I wanted.
 
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