RoeBuck
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I'm not a pro at all man. I'm still learning about Hydroponics but I will try to take a stab at it. It could be that you need to thoroughly clean your system or your plants are at a stage where they are processing nutrients rapidly. Maybe you need more frequent water changes.I've had this happen to me twice now and it's got me stumped. My system ppm was a little high so I removed 7 gallons of solution and added straight RO to dilute it. Before I removed the solution the pH was right around 5.8. The day after it had dropped to 4.9 so I added a bit of pH up. Within 2 more days it crashed to 4.0. I ended up dumping the system and adding fresh nutes. Has anyone else had this happen to them? I'm planning on calling Cultured Solutions and talking to them about it but in the mean time, thought I'd see if anyone here has had a similar experience.
You should prob post that your running a UC systen so that the replys you get our more on target... Im not for sure either one of them guys understand the UC and its very different feeding schedule..I've had this happen to me twice now and it's got me stumped. My system ppm was a little high so I removed 7 gallons of solution and added straight RO to dilute it. Before I removed the solution the pH was right around 5.8. The day after it had dropped to 4.9 so I added a bit of pH up. Within 2 more days it crashed to 4.0. I ended up dumping the system and adding fresh nutes. Has anyone else had this happen to them? I'm planning on calling Cultured Solutions and talking to them about it but in the mean time, thought I'd see if anyone here has had a similar experience.
How quickly did you add back? U wouldnt think that it would matter, but maybe it does when you are very low ec? That is just a guess... I know that its hard to ph ro because there isnt no buffering agents in the water. I wonder if adding a very very tiny amount of nutrients to the ro you are adding back. mix them in a 5 gal bucket so its an ec of .03 to try to get it to buffer the ph better when added.. Again just a guess, or what I would try...You should prob post that your running a UC systen so that the replys you get our more on target... Im not for sure either one of them guys understand the UC and its very different feeding schedule..
This is a good question... Has anybody else had this problem?
What was your Ec after you put the plain ro back in?
I'm not a pro at all man. I'm still learning about Hydroponics but I will try to take a stab at it. It could be that you need to thoroughly clean your system or your plants are at a stage where they are processing nutrients rapidly. Maybe you need more frequent water changes.
Yur n flower rite?cuz u raise n veg n drop n flower..its very common.drop yur nutes down bro
You should prob post that your running a UC systen so that the replys you get our more on target... Im not for sure either one of them guys understand the UC and its very different feeding schedule..
This is a good question... Has anybody else had this problem?
What was your Ec after you put the plain ro back in?
How quickly did you add back? U wouldnt think that it would matter, but maybe it does when you are very low ec? That is just a guess... I know that its hard to ph ro because there isnt no buffering agents in the water. I wonder if adding a very very tiny amount of nutrients to the ro you are adding back. mix them in a 5 gal bucket so its an ec of .03 to try to get it to buffer the ph better when added.. Again just a guess, or what I would try...
When was your last drain and refill? In my experience after 2 weeks my ph drops so I change it every 2 weeks. CCH2O says change every 14-21 days.
Could be a sign of root/stem rot. Have you been keeping your water level below the net pots?
Another thought is the ro you were adding back, you might have been able to add a couple cups of tap to the ro then ph, then slowly add to system...Not everybody has irrigation water with high alkalinity. In one study from Michigan State University, about 30 percent of the irrigation water tested had alkalinity levels below 40 ppm without any acidification. Even in areas where high alkalinity is considered normal, some growers have switched to low alkalinity sources such as reverse osmosis purified water or rain water.
The primary problem associated with low alkalinity water is a tendency for substrate pH to drop over time, which can cause micronutrient toxicity problems (Figure 3). Low media pH problems are often a result of fertilizer selection. Fertilizers high in ammoniacal nitrogen are acidic, and without any alkalinity in the water to balance the reaction (resist lowering of pH), acidic fertilizers will tend to drive the substrate pH down over time.....
There is the answer... You needed to mix in that 5 gal bucket some ca...
then ph it to 6,
then slowly add it to the system.
let it go 24 hrs and pull a 5 gal bucket from the system, and adjust ph in the bucket to 6.
repeat till at 5.8 or what ever you was shooting for...
Always add it back slow as the water is circulated so fast that rapid changes in ph can shock the plants from what I have read...
I even got an email from a person that had run the UC and he said, for what this is worth, if when adjusting the ph down I over shot my mark, that I had to dump the res and start over. He said not to use ph up.
I really dont know why this is and I havent had time to google and find anybody to substantiate these claims...
But I thought I would add that here.. Have NO IDEA if they is any truth in that..
As much as we know, he might not know shit, and thats why he sold me his UC system after 4 months :)
He did say in his email when i asked him why he was selling it, he said he got caught up in the hype, and that he had a family and realized he was being very stupid...
So I doubt he had very much knowledge of the UC system...
I guess I can always bug CC for the answers lol...
That was what I was talking about!R.O . Water does not have any alkalinity to stabilize the ph.
http://www.greenhousegrower.com/pro...ant-nutrition-irrigation-water-alkalinity-ph/
It prob isnt.. Its prob giving a incorrect reading since it has no alkalinity. Ive seen my meter go to invalid reading when putting in to my ro..But what makes me wonder is why his RO is 6.3. My 0 ppm RO is within a few point of 7 pH always.
Sorry, wrong thing in thoughts.It prob isnt.. Its prob giving a incorrect reading since it has no alkalinity. Ive seen my meter go to invalid reading when putting in to my ro..
Does your actually give a ph reading in 0 ppm ro?
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