What's new

Difference between gh Europe and gh US

M

maimunji

Active member
This is flora micro for soft water bottle.

And this is flora bloom

When I add 6/9 per us gallon ppm is 650 including my tap water 140 ppm.
Any difference whit gh US version?
What will be my nute profile whit 6/9 per us gallon?
 
M

maimunji

Active member
In eu label, instead ca is cao, istead mg is mgo, and istead sulphur is so4. Anyone know what is difference and do I need to make some kind converting?
 
Dkgrower

Dkgrower

Active member
Veteran
Its just because they write the oxide% to make it seam like there is more in the bottel
differnet countrys have different regulations

An exsample, canna's PK 13-14 is not 13% P and 14%K, because its 13% Phosphorus pentoxid so if you want the true P value you have to remove the Oxygen from the volume%

There are a zillion charts that have Oxide to Element conversion but its really simle math so try n do the math...

Exsample with P, 13% Phosphorus pentoxid P2O5 so there are 5 oxygen atoms pr 2P.

check the periodic tabel n you find the weigth of the elements.

Oxygen is 15.9994 and P is 30.3738

so to find how much P there is in 13% P2O5 is

4*15,9994+ 2*30,3738 = 124.7452 = weight of P2O5

2*30.3738 = 60,7476 weight of the 2 P

So if you divide 60.7476 with 124,7452 its = 0,48 so 48% in P2O5 is P the rest 52% is oxygen, ergo those 13% is acually 0.48*13= 6,2%

Maby know you see why some fert company love to express there content as oxides because then it seam like there is more in the bottel.

Anyway most nutrient calculators allow you to input values expressed in oxides
 
G

glow

Active member
Dkgrower said:
Its just because they write the oxide% to make it seam like there is more in the bottel
differnet countrys have different regulations

An exsample, canna's PK 13-14 is not 13% P and 14%K, because its 13% Phosphorus pentoxid so if you want the true P value you have to remove the Oxygen from the volume%

There are a zillion charts that have Oxide to Element conversion but its really simle math so try n do the math...

Exsample with P, 13% Phosphorus pentoxid P2O5 so there are 5 oxygen atoms pr 2P.

check the periodic tabel n you find the weigth of the elements.

Oxygen is 15.9994 and P is 30.3738

so to find how much P there is in 13% P2O5 is

4*15,9994+ 2*30,3738 = 124.7452 = weight of P2O5

2*30.3738 = 60,7476 weight of the 2 P

So if you divide 60.7476 with 124,7452 its = 0,48 so 48% in P2O5 is P the rest 52% is oxygen, ergo those 13% is acually 0.48*13= 6,2%

Maby know you see why some fert company love to express there content as oxides because then it seam like there is more in the bottel.

Anyway most nutrient calculators allow you to input values expressed in oxides
Click to expand...

Lol dude that was a complex way of explaining it but good on you. And yeah sometimes they are forced to list as P2O5 and K2O because of regulations. The US use P2O5 and K2O whereas in other countries they list as P and K. Basically though false advertising (lol overstating shit) is enforced by law in the US and yeah

When potassium (K) is listed as K2O this represents 83.014% elemental K

When phosphorous is listed as P2O5 this represents 43.641% elemental P

so all you have to do is multiply the P2O5 listing as e.g. 1% P205 = 1 x 0.43641 = 0.43641 elemental P

and a K2O listing of e.g. 5 would be 5 x 0.83 = 4.15 elemental K.

In Europe I think they can list the oxide form or the elemental form of a nutrient or both forms. So it basically comes down to different regulations between countries that determines how manufacturers list
 
You must log in or register to reply here.

Latest posts

Latest posts

Top