best/safest regular PH Down? - Growing in Coco Coir - International Cannagraphic Magazine Forums

Grenouille · 02-15-2007, 02:48 AM

What are the differences between phosphoric and nitric acid are when it comes to how they affect your plant/nutrient solution?

any info on the topic would be appreciated.

Grenouille · 02-15-2007, 02:53 AM

just tested the ph of my tapwater, it's about 8.5

this would go even higher with nutes added, correct?

Hold Your Fire · 02-15-2007, 02:55 AM

I'm using Earth Juice all natural ph down. I hand water and use grow bags filled w/ soilless mix. So far the product is working great and I'm 2 weeks from harvest!
p.s. a very small amount goes a long way.

Hold Your Fire · 02-15-2007, 02:59 AM

My water also tested above 8.0. The E.J. crystals took care of this and I have plenty left over for later use.

Grenouille · 02-15-2007, 03:08 AM

that utilizes citric acid i see,
just had a look around - seems a bit tricky to get here in the uk.

Grenouille · 02-15-2007, 03:20 AM

just saw this in another thread:

Quote:

Originally Posted by Caligrown

This is from the Canna research department in a document called:

"Everything you ever wanted to know about CANNA COCO"

Damage to crop caused by hard water
Normally, PK13/14 and CANNA COCO nutrients can be
used together. However, in case the tap water is very
hard, this combination can cause problems. Very hard
water contains high amounts of calcium and the
amount of acid necessary to set the pH is relatively high.
This is due to a high bicarbonate level in the water.
When PK 13/14 is used under such circumstances the risk
of precipitation in the water tank increases, and this can
cause blocked drippers. If you use very hard water for
irrigation it is recommended to use pH – grow (nitric
acid) instead of pH – Bloom (Phosphoric acid) to set the
pH.

Cali-

so i should go for nitric?

if someone could still clarify the differences between the types it would be great though.

Grenouille · 02-15-2007, 03:35 AM

why does phosphoric seem to be favoured during bloom-phase, and nitric during veg?

Grenouille · 02-15-2007, 03:47 AM

i bought some silicon as well, just read the back, 'is highly alkaline'

is adding all of this ph down going to harm the plants.

Mo Budz · 02-15-2007, 03:55 AM

Nitric Acid is favored in veg because it contains some nitrogen, but it is alot nastier then phospheric acid, which can still mess you up if you spill on your self or decide to drink the stuff. Phospheric acid has phosphorous in it which is good for bloom. Many people just use the phospheric acid for the whole grow and bloom with no problems.

Grenouille · 02-15-2007, 04:03 AM

^but surely not a significant amount of nitrogen. it wouldn't stunt blooming for example, would it?

02-15-2007, 02:48 AM	#1
Grenouille .. Join Date: Feb 2006 Location: green fields Posts: 115	best/safest regular PH Down? What are the differences between phosphoric and nitric acid are when it comes to how they affect your plant/nutrient solution? any info on the topic would be appreciated. __________________ Quis custodiet ipsos custodes? Last edited by Grenouille; 02-15-2007 at 03:33 AM..
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02-15-2007, 02:53 AM	#2
Grenouille .. Join Date: Feb 2006 Location: green fields Posts: 115	just tested the ph of my tapwater, it's about 8.5 this would go even higher with nutes added, correct? __________________ Quis custodiet ipsos custodes? Last edited by Grenouille; 02-15-2007 at 02:55 AM..
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02-15-2007, 03:08 AM	#5
Grenouille .. Join Date: Feb 2006 Location: green fields Posts: 115	that utilizes citric acid i see, just had a look around - seems a bit tricky to get here in the uk. __________________ Quis custodiet ipsos custodes?
	Quote

02-15-2007, 03:35 AM	#7
Grenouille .. Join Date: Feb 2006 Location: green fields Posts: 115	why does phosphoric seem to be favoured during bloom-phase, and nitric during veg? __________________ Quis custodiet ipsos custodes?
	Quote

02-15-2007, 03:47 AM	#8
Grenouille .. Join Date: Feb 2006 Location: green fields Posts: 115	i bought some silicon as well, just read the back, 'is highly alkaline' is adding all of this ph down going to harm the plants. __________________ Quis custodiet ipsos custodes?
	Quote

02-15-2007, 02:55 AM	#3
Hold Your Fire Finding my way back home Join Date: Oct 2006 Location: Free flowing, happily lost in thought. Posts: 5,881	I'm using Earth Juice all natural ph down. I hand water and use grow bags filled w/ soilless mix. So far the product is working great and I'm 2 weeks from harvest! p.s. a very small amount goes a long way.
	Quote

02-15-2007, 02:59 AM	#4
Hold Your Fire Finding my way back home Join Date: Oct 2006 Location: Free flowing, happily lost in thought. Posts: 5,881	My water also tested above 8.0. The E.J. crystals took care of this and I have plenty left over for later use.
	Quote

02-15-2007, 03:55 AM	#9
Mo Budz Member Join Date: Aug 2006 Location: MARS Posts: 97	Nitric Acid is favored in veg because it contains some nitrogen, but it is alot nastier then phospheric acid, which can still mess you up if you spill on your self or decide to drink the stuff. Phospheric acid has phosphorous in it which is good for bloom. Many people just use the phospheric acid for the whole grow and bloom with no problems. __________________ "Family First"
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02-15-2007, 04:03 AM	#10
Grenouille .. Join Date: Feb 2006 Location: green fields Posts: 115	^but surely not a significant amount of nitrogen. it wouldn't stunt blooming for example, would it? __________________ Quis custodiet ipsos custodes?
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