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Dwc Ph Jump 6.0 to 7.0 in 24hrs

rwdyredhead

rwdyredhead

New member
I fed my girls for the 1st time yesterday and ph'ed the water to 6.0 but when I checked it today the ph was 7.0+ and I'm not sure why. They're 6 days from sprout in 5 gal. buckets, using GH Flora Trio, CalMag, and Hydroguard. Any ideas why the ph would jump up like that?
 
rwdyredhead, It could be that the plants are using the nutrients, When I put the nutrient in the water (all ready pH'ed to 6.0) the pH goes down to around 4.5 to 4.7 and I add some pH up to bring it back to around 6.0. At mid week the pH can jump up as the plants take up the nutrients. Are You feeding them a lite amount of nutrients or a stronger amount? Can You tell how much water that they are using?
My plants are about to go into their 11th week of bloom and are using from 1 to 1 1/2 gallons each week, more when the temperature climbed a couple of weeks ago (we set new record highs for February, 87 deg. F!).
 
They're just 6 day old seedlings w/one little taproot just into the water so they're not using any water yet. I'm thinking it could be my water. I live in the boonies & have water from a deep well-150ft into the ground. You would think that would be a good thing but maybe not? It comes out the tap at around 7.0.
 
I to have a well and the water is too hard to use for growing. Had my water sent to a lab for testing and the hardness was off the chart. I use RO water instead and am very happy with it.
 
That has to be my problem. I added 27 drops of ph down 2 hrs ago & the ph was 6.0 & now it's right back to about 7.5+
I tested my hydroton and it did not affect my ph so it has to be the water.
I know nothing about RO water tho, can you give me a quick run down? DO you have a system to get the water like that?
I need to fix this quickly because my seedlings already are showing symptoms from the high ph. Thanks Budd!
 
Hey Rowdy, I bought a couple of the filled 5 gallon jugs at Lowes (Walmart also carries them). I refill them ($1.00 for 5 gallons) at the gas station so the cost is not bad once you have the 5 gallon jugs. I would drain and refill with the RO water now. If you have a clean 5 gallon bucket with a lid you could use that instead of the jugs. If you use the 5 gallon bucket make sure it can not slide around while you are driving, the top will come off if it tips over. Sucking up 5 gallons of water from your car is not fun.
 
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hi rowdy! I'm DWC and also had this issue. common thing I found. PH in DWC tends to rise after it goes into the reservoir because of the massive oxygenation caused by our bubblestones. with lower levels of nutrients, I've found it jumps higher, just like yours. now with a lot more nutrents it only jumps half as much. about .5.
you need to ph accordngly. if you know its gonna jump a full digit...ph a full digit low.
also, you will likely find it falling after a bit. this is normal too. you can adjust it back at midweek.
when using less nutrints, again, it also falls slower than when I'm using max nutrients.
hope that helps n rest ur worries some. good luck
 
I don't intend to sound mean but don't check your pH everyday, it fluctuates. DWC is appealing because it is low maintenance you don't need to check the pH everyday especially if your plants are healthy.
 
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I agree to a point. it fluxuates for me all week and my plants have never taken damage from it. however... you do need to keep it in range if you want your plant to grow. if you don't care how fast your grow progresses, go ahead and let it go til the plant shows signs. If your ph isn't between 5.5 and 6.5, your plant is slowing down.
rowdy posted her ph was 7.0, and that is nute lock range if left that way.
I don't think ur trying to be mean, we are all here to help and be helped.
 
I'm with Grinder on this-I have had experience 'chasing' pH and it didn't end well...
Let the plants tell you if something is outta whack. I'll stick the pen into the rez each day when I check levels and won't make ANY adjustments to pH unless it's at least 1/2 pt outta range(5.5-6.5). Again, I only act if the plants are showing signs of distress or it's outta the 5-7 range.
 
I'm definitely not chasing ph and don't normally check it and do it again after 2hrs! I did recognize some early signs of problems with my seedlings tho, like intergalactic_harvester said-they had stopped growing- and I'm very glad I checked the ph and rechecked it and didn't write off the high ph levels as normal fluctuations because I would have regretted it in a day or two...my water is definitely not suitable for dwc out of the tap...I changed out 2 of my buckets with distilled water and 8 hours later they are still stable @ 6.2...exactly what I ph'ed them to.
The 2 buckets I didn't change out to distilled water are at around 8.0 right now so they're getting changed first thing in the morning. Thanks to everyone for your help and advice! Don't know what I'd do without my forum family!! :)
 
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