Water Quality

stonerpaddy

stonerpaddy

Active Member
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I was having a few problems with my last grow and decided to get a water analysis done. It was after I realised I didn't have a hope in hell of actually understanding it. Just really don't have much knowledge in the area. Any help is appreciated.
 
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The only real problem came fairly late in flower with yellowing and tacoing of the leaves. The pics above are fairly late last harvest.
Was running with a humidity in the 70s last time around so I added a few fans already and have it down to a mid 50s mark.
Really only got the water analysis done cause its from a private well and couldn't guarantee its quality.
 
To keep it simple all you really want to worry about on that water quality test is the PH of your water (hopefully you test and correct it yourself though) & the conductivity of the water as you will want to slightly offset the amount of fertilizer you use based on how high the conductivity of your tapwater is. Im assuming you dont mix your own nutes in pure form/elemental forms?

Are you taking readings of your fertilized water & drain water?


Example: If your tap water had an EC (electro conductivity) of 1.0mS you would not want to add an additional 1-1.8mS of fertilizer on top of that because you would end up with 2.8mS.

^ the above would only happen if you did not take readings of your fertilizer levels and were strictly using a feeding chart for how much fertilizer to add that was based off of using Distilled/RO water that has a conductivity of ~0.
 
stonerpaddy said:
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I was having a few problems with my last grow and decided to get a water analysis done. It was after I realised I didn't have a hope in hell of actually understanding it. Just really don't have much knowledge in the area. Any help is appreciated.
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Damn good water quality regarding the pH, TDS, and hardness. My hardness (TDS) is 4 times as hard (800 + ppm), consider yourself lucky.

Problems during flowering? Fess up, you were using bloom foods, right? However, your plants look good to me.

UB
 
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Growing in coco and the pH was always kept around 5.8 to 6.0 The EC of the water at the tap is usually around 0.2 to 0.4 and using Cannas A + B (5-4-3). EC never went over 1.2. Think EC is the same as mS.

Ben, Iv'e bought a bottle of pK 13/14 but didn't use it last time. Took some of your advice already and got a 27-0-0 nute. I figured the Canna nutes weren't that far out from the 20-20-20 you usually talk about and going to use the 27-0-0 mabe once a month or so at 5ml/15L water. Know you have issues with coco but I like it as a medium. The plants are a week 12/12 in the pics

Was thinking about the RO units but had to get an analysis done on the water as its a private well and it really should have been done years ago.
 
The Canna nutes are 5-4-3. Don't think I ever went passed 4ml/L with them which I don't think is that high and it went like this:

Week 1 12/12. Leaves nice healthy green.
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Week 7 12/12. The larger fan leaves yellow off at the bottom and the higher up leaves begin to taco. This starts happening from week 5-6
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By week ten all the big fans had curled in on themselves completely.
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These were two Northern Lights with a 10 week flower and a few people have said before that it was probably just the plants finishing up causing the curling of leaves. It was just with the private well I was wondering if it could be the water that was off and had to get the test done for a few other reasons too.
 
Weird. There's something about that brand your plants don't like, or there is something else working as in temps being way off. The standard NPK values I follow for foliage plants like cannabis is 3-1-2 as in Dyna-Gro's Foliage Pro which I highly recommend.

Leaf margin curl is a classic symptom of plant moisture stress.

Good luck....
 
The temps weren't the best last grow but only crossed the 90 degree mark once. Had a list of stuff I thought it might be which was temps, humidity, air exchange and water quality. I've already stuck in an 8" extractor and 6" intake as well as a few oscillating fans to help with temps, humidity and air movement and have the humidity down to the mid 50s mark.

Only thing I wasn't too sure about was the water quality and you answered that question already so cheers for that. At this stage I'm probably going to wait and see how the current crop comes out before doing anything else.

Also, learned a fair amount from your other threads too so thanks for sharing the info.
 
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