Water Chemistry

General Information	pH
Dissolved Oxygen	Water Quality of Dallas

General Information

Ammonia in Fish Ponds (09/00)
An Introduction to Water Chemistry in Freshwater Aquaculture (09/00)
Behavior and Physiology of Nitrifying Bacteria (09/00)
Biofilter.com (great articles) (09/00)
Drinking Water and Disinfection By-products (09/00)
Fish Farmer's Guide to Understanding Water Quality (9/00)
Nestor's Freshwater Chemistry (09/00)
Nitrite in Fish Ponds (09/00)
Norm Meck's Pond Water Chemistry (1999 version) (09/00)
Norm Meck's Pond Water Chemistry (1996 version) (09/00)
Roark's Notes on Water Quality (09/00)
Water Chemistry Explained (The Plant Place) (09/00)
Water Quality (Koivet) (09/00)

Dissolved Oxygen

Carbon Dioxide in Fish Ponds (09/00)
Dissolved Oxygen and Test Kits (The Plant Place) (09/00)
Dissolved Oxygen Calculator (09/00)
Help! I Can't Breathe (Aeration) (09/00)
Pond Aeration (09/00)

Dissolved oxygen versus temperature for various altitudes:

Degree C	Degree F	O2 ppm, 0 feet	O2 ppm, 500 feet	O2 ppm, 5000 feet
0 C	32 F	14.621	14.362	12.228
5 C	41 F	12.771	12.545	10.676
10 C	50 F	11.288	11.087	9.429
15 C	59 F	10.084	9.904	8.415
20 C	68 F	9.093	8.929	7.578
25 C	79 F	8.264	8.114	6.876
30 C	86 F	7.559	7.420	6.275
35 C	95 F	6.949	6.820	5.752
40 C	104 F	6.413	6.291	5.287

Decrease the oxygen concentration by 1% for each:

1000 ppm salinity
300 feet in elevation above sea level
8 mb or 0.24 inches Hg lower barometric pressure (compared to sea level)

Less than 5 ppm causes stress in fish; less than 3 ppm causes death.

pH

Interactions of pH, Carbon Dioxide, Alkalinity and Hardness in Fish Ponds (09/00)
pH: Breath of a Pond (09/00)
pH Defined (The Plant Place) (09/00)
pH Pill (Koivet) (09/00)
Testing pH and Buffering Capacity (The Plant Place) (09/00)

Water Quality of Dallas, Texas

What does an analysis of Dallas water reveal?
I have contacted the laboratory at the Dallas Water Utility -- (214) 670-0900. The technician stated that my water contains both chloramine and ammonia.

Recent analysis of water from the Elm Fork Water Treatment Plant (03/16/98)

Parameter Standard
mg/l Average
mg/l Range
mg/l

Total Alkalinity as CaCO3 No Stnd 54 24-84

Calcium No Stnd 34 29-42

Chloride as NaCl 300 42 37-47

Nitrate (as N) 10.00 1.00 0.70-1.50

Nitrite (as N) 1.00 <0.02 <0.02

Phosphate (as P) No Stnd 0.06 <0.02-0.10

Sulfate 300 54 24-78

Total Dissolved Solids 1000 197 155-229

Total Hardness No Stnd 103 71-190

Non-Carbonate Hardness No Stnd 47 33-56

Potassium No Stnd 4.5 4.0-7.5

Sodium No Stnd 22 15-32

Total Trihalomethanes 0.100 0.043 0.020-0.090

Total Chlorine Residual 0.5 minimum 3.30 2.90-3.70

Temperature, deg F. No Stnd 68 43-87

pH Units 6.0-9.0 8.7 8.5-8.9

Parameter	Standard mg/l	Average mg/l	Range mg/l
Total Alkalinity as CaCO3	No Stnd	54	24-84
Calcium	No Stnd	34	29-42
Chloride as NaCl	300	42	37-47
Nitrate (as N)	10.00	1.00	0.70-1.50
Nitrite (as N)	1.00	<0.02	<0.02
Phosphate (as P)	No Stnd	0.06	<0.02-0.10
Sulfate	300	54	24-78
Total Dissolved Solids	1000	197	155-229
Total Hardness	No Stnd	103	71-190
Non-Carbonate Hardness	No Stnd	47	33-56
Potassium	No Stnd	4.5	4.0-7.5
Sodium	No Stnd	22	15-32
Total Trihalomethanes	0.100	0.043	0.020-0.090
Total Chlorine Residual	0.5 minimum	3.30	2.90-3.70
Temperature, deg F.	No Stnd	68	43-87
pH Units	6.0-9.0	8.7	8.5-8.9

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bonniehill@verizon.net

last modified on June 25, 2008

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