prospero said:

Hi folks. This is my 1st coco, but my 3rd indoor grow. My question is "Should the ph in my runoff lower as I flush with lower ph water. I am setting ph to 5.7 -5.8 but getting runoff 6.1 - 6.2 even as high as 6.3. I tired flushing 1 plant and 40 litres only moved it from 6.2 to 6.1. I have noticed some yellow spots on lower leaves and am thinking it could be manganese deficiency as its only available around 5.6 - 5.7. I am growing 6 plants in 4 × 4 x 6 ft tent running 600 watt dual spectrum lamp. I am using general hydroponics trio + Calmag. View attachment 764058 Help much appreciated. Thanks in advance.

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prospero said:

Hi folks. This is my 1st coco, but my 3rd indoor grow. My question is "Should the ph in my runoff lower as I flush with lower ph water. I am setting ph to 5.7 -5.8 but getting runoff 6.1 - 6.2 even as high as 6.3. I tired flushing 1 plant and 40 litres only moved it from 6.2 to 6.1. I have noticed some yellow spots on lower leaves and am thinking it could be manganese deficiency as its only available around 5.6 - 5.7. I am growing 6 plants in 4 × 4 x 6 ft tent running 600 watt dual spectrum lamp. I am using general hydroponics trio + Calmag. View attachment 764058 Help much appreciated. Thanks in advance.

Click to expand...

prospero said:

Hi folks. This is my 1st coco, but my 3rd indoor grow. My question is "Should the ph in my runoff lower as I flush with lower ph water. I am setting ph to 5.7 -5.8 but getting runoff 6.1 - 6.2 even as high as 6.3. I tired flushing 1 plant and 40 litres only moved it from 6.2 to 6.1. I have noticed some yellow spots on lower leaves and am thinking it could be manganese deficiency as its only available around 5.6 - 5.7. I am growing 6 plants in 4 × 4 x 6 ft tent running 600 watt dual spectrum lamp. I am using general hydroponics trio + Calmag. View attachment 764058 Help much appreciated. Thanks in advance.

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prospero said:

Alls good now. Dont bother readibg run off any more. Flushed well and set nutes to ph 5.8 and they are looking good and at last producing a great smell :) Couldnt as yet provide natural light pic. But here is how they are progressing. Another week and I will switch 12 - 12.

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NotaRasta said:

Somebody told me to read runoff before. I was chasing my tail trying to correct issues. Imo reading runoff is pointless. Finally got things turned around and growing like they should. I run my ph @ 5.9-6.1

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prospero said:

Here are latest pics, 1 week and 2days since 12 - 12. Had some good advice from @EventHorizan regarding feeding. Much appreciated. Looking forward to any more input.

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NotaRasta said:

Somebody told me to read runoff before. I was chasing my tail trying to correct issues. Imo reading runoff is pointless. Finally got things turned around and growing like they should. I run my ph @ 5.9-6.1

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NotaRasta said:

I dont remember what the issue was that i was having but it was mentioned that my ph coming out should be close to what was going in. It never was for whatever reason so I would adjust ph going in to try and compensate. Then someone else said to quit worrying about. Make sure what was going in was at the target ph and to make sure i watered enough to get runoff. I havent checked runoff since.

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EventHorizan said:

And I agree 100% with that!
But checking ppm in run off every once in awhile, untill you have an automated system, and have used it thru a few grows, checking run off ppm can tell you if your coco is drying out any in the middle of the root ball, as the ppm will rise when that happens.
So if you are adding 1.6 ec, and couple weeks down the road, you have a plant showing some claw, or other symptoms, then a quick check of ppm run off can give you an idea of weather you need to up the frequency of watering..
As for Ph, I wouldnt waste the time even tho you will notice salt build up will cause higher ppm and a lower ph in the rhizophere.

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EventHorizan said:

And I agree 100% with that!
But checking ppm in run off every once in awhile, untill you have an automated system, and have used it thru a few grows, checking run off ppm can tell you if your coco is drying out any in the middle of the root ball, as the ppm will rise when that happens.
So if you are adding 1.6 ec, and couple weeks down the road, you have a plant showing some claw, or other symptoms, then a quick check of ppm run off can give you an idea of weather you need to up the frequency of watering..
As for Ph, I wouldnt waste the time even tho you will notice salt build up will cause higher ppm and a lower ph in the rhizophere.

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Enforcer said:

Thanks for posting this as it cleared up a few things for me. Especially the part about ppm rise and watering. I just checked my run off this morning and I'm within 100 ppm (little bit higher out than in). As for ph, I checked that too just to see what it said. My ph going in is about 6.3 (ph perfect nutes). Ph coming out was 4.7. My plants are not perfect, but they are humming right along without any major issues. Only have 2 weeks left. I'm not going to stress over erroneous ph readings.

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EventHorizan said:

2 weeks left to harvest?

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Enforcer said:

Yeah. White Widow, taking them 9 weeks.

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EventHorizan said:

In coco?
pics?

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