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Search: Keyword(s): ; Posts Made By: Jacan
Forum: Fertilizers and Water Parameters 08-02-2005, 04:47 PM
Replies: 2
Views: 507
Posted By Jacan
http://www.bestfish.com/tips/091798.html You...

http://www.bestfish.com/tips/091798.html

You are not the the only one with high readings when yousing amquel and AP.
Forum: Fertilizers and Water Parameters 07-19-2005, 03:19 PM
Replies: 5
Views: 660
Posted By Jacan
http://www.ca.uky.edu/wkrec/InteractionspHEtc.PDF...

http://www.ca.uky.edu/wkrec/InteractionspHEtc.PDF

Maybe the link can give you an answer to your question!

The pH-KH-CO2 chart is for a constant 25C (78F), so it do lies at 15C or lower.
Forum: Fertilizers and Water Parameters 04-14-2005, 09:51 PM
Replies: 18
Views: 1,131
Posted By Jacan
Free ammonia is NH3 so NH4+ is bound ammonia. the...

Free ammonia is NH3 so NH4+ is bound ammonia. the ratio NH3:NH4+ depends upon the pH and temperature, and of the two ammonia form NH3 is considerably more toxic to fish than NH4+, so if pH<7 the...
Forum: Fertilizers and Water Parameters 04-03-2005, 03:14 PM
Replies: 1
Views: 716
Posted By Jacan
Ca++ has a valency of 2 so 1ºdH = 0,358mEq/L Ca++...

Ca++ has a valency of 2 so 1ºdH = 0,358mEq/L Ca++

The calculations are correct
Forum: Fertilizers and Water Parameters 01-08-2005, 07:26 PM
Replies: 9
Views: 1,766
Posted By Jacan
Calciumcarbonate CaCO3 disolve in water with CO2...

Calciumcarbonate CaCO3 disolve in water with CO2 and H2O

CaCO3+H2O+CO2 <=> Ca2(HCO3)

1 teaspoon of calciumcarbonate = 2-3 g, and 1 dH = 1mg CaCO3/L, so 3 - 4 teaspoon is way to much for a few...
Forum: Fertilizers and Water Parameters 11-15-2004, 04:25 PM
Replies: 6
Views: 590
Posted By Jacan
Is it 3 or 3,6 or … ? pH = pKA – log( [A] /...

Is it 3 or 3,6 or … ?

pH = pKA – log( [A] / [B] )
pH = pKA – (log[A] – log[B])
pH = pKA – log[A] + log[B]
log[A] = pKA – pH + log[B]
[A] = 10^(pKA – pH + log[B])
A = M(A) · 10^(pKA – pH +...
Forum: Fertilizers and Water Parameters 10-16-2004, 09:12 AM
Replies: 11
Views: 817
Posted By Jacan
The density of KNO3 = 1,145 g/ml and one tsp =...

The density of KNO3 = 1,145 g/ml and one tsp = 5ml, so you will get 5,725g/tsp.
It is a good idea to buy a set of spoons used for baking! I dont know how much a tsp. is in (gallons) but 5ml is...
Forum: Fertilizers and Water Parameters 10-11-2004, 10:35 PM
Replies: 4
Views: 2,005
Posted By Jacan
Hi Rolo I read you thread ”The PH-KH-CO2...

Hi Rolo
I read you thread ”The PH-KH-CO2 equation completely wrong?” Yes and no!!
I agree with the equation if you switch pH and pKa

pH = pKa + log([HCO3–] / [CO2])

10^(pH-pKa) = ([HCO3–] /...
Forum: Fertilizers and Water Parameters 10-03-2004, 12:51 PM
Replies: 8
Views: 585
Posted By Jacan
1 teaspoon NaHCO3 (3,5gram) per 10 gallons will...

1 teaspoon NaHCO3 (3,5gram) per 10 gallons will increase KH with

3,5g NaHCO3/10gallons = 92mg NaHCO3/L = 67mg HCO3– /L = 3,1ºdH

To make a permanent KH with crushed corals CaCO3, a...
Forum: Fertilizers and Water Parameters 08-21-2004, 11:44 PM
Replies: 19
Views: 4,178
Posted By Jacan
http://www.natlex.dk/syrekonst.html ...

http://www.natlex.dk/syrekonst.html
http://www.natlex.dk/koncentration.html
Beregning af molarmasse & koncentration

Hey Rolo
This is the danish site I was referring to.
The first is a...
Forum: Fertilizers and Water Parameters 08-21-2004, 07:16 AM
Replies: 19
Views: 4,178
Posted By Jacan
I have a hard time to find the definition of 10mg...

I have a hard time to find the definition of 10mg CaO/L = 1ºdH and 1mg CaCO3/L = 1 ppm, but I got it from some german sites (not aqaurium sites :proud: ). The rest I Figure out from a danish chemist...
Forum: Fertilizers and Water Parameters 08-20-2004, 08:41 PM
Replies: 19
Views: 4,178
Posted By Jacan
I hope this can be at any help M(CaCO3) =...

I hope this can be at any help

M(CaCO3) = 100,09g/mol
M(CaO) = 56,08g/mol
M(Ca) = 40,08g/mol
M(Mg) = 24,31g/mol
M(HCO3) = 61,02g/mol

10mg CaO/L = 1ºdH (deutsche härtegrader)
10mg/L x...
Forum: Fertilizers and Water Parameters 07-27-2004, 10:42 PM
Replies: 18
Views: 1,737
Posted By Jacan
The problems about measuring chelated Fe in the...

The problems about measuring chelated Fe in the tank, could simply be that it is the same chelate (EDTA) there is used to determine the concentration of Fe.

So the Fe is already chelated and there...
Forum: General Planted Tank Discussion 04-09-2004, 08:14 AM
Replies: 9
Views: 537
Posted By Jacan
I would say that they both are males, and the...

I would say that they both are males, and the rest of them in your LFS are probably males too.
The reason is that WF Ancistrus often are males because they are catch by lifting up woods and it will...
Forum: Fertilizers and Water Parameters 04-06-2004, 09:26 AM
Replies: 10
Views: 1,114
Posted By Jacan
Calciumcarbonate CaCO3 disolves in acid water so...

Calciumcarbonate CaCO3 disolves in acid water so boiling it will not help much

CaCO3(s) + H2O(l) + CO2(g) -&gt; Ca2+(aq) + 2HCO3-(aq)

So to raise both GH and KH you need CO2 with rour...
Forum: Fertilizers and Water Parameters 04-05-2004, 12:04 AM
Replies: 17
Views: 4,888
Posted By Jacan
Your test kit must be measuring CaO because that...

Your test kit must be measuring CaO because that will give the calculation from Water Hardness 150 to (8.4 DH).
The test kit must be pretty old because CaO is actually water hardness as it was...
Forum: Lighting 04-28-2003, 03:26 PM
Replies: 16
Views: 1,939
Posted By Jacan
The price is way too high for T5, the problem...

The price is way too high for T5, the problem with T5 is that its not commonly known, but T5 is produce by Philips, Osram, and many more known companies in Europe. Try and check out Philips
...
Showing results 1 to 17 of 17

 
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