Stuppy Aquaponics Blog

AQUAPONICS Water Quality

Posted by Conor Quinlan on Dec 12, 2016 2:22:44 PM

 

 

Nitrogen (mg/L)

 

 

 

Date

pH

Total Ammonia

Ammonia

Nitrite

Nitrate

Temp (Fo)

Alkalinity

mg/L

EC (mS)

11/14/16

6.6

0.25

neg

0.5-1

>160

70.2

25

2.11

11/15/16

6.6

0.25

Negligible

0.5

>160

70.9

22.5-25

2.08

11/16/16

6.6

0.25

Neg.

0.25-0.5

>160

70.8

22.5

2.05

11/17/16

6.6

0.25

neg

0.5

>160

72.9

22.5-25

2.09

11/18/16

6.6->7.0

0.25

Negligible

0.5

>160

72.5

25->40

1.95

11/21/16

6.8-7.0

0.25

Neg.

0.5 – 1.0

>160

67.2

42.5

2.04

11/22/16

6.8-7

0.25

Neg.

1.0

>160

69

42.5

2.06

Tilapia-1.jpg

COMING SOON! Video Blog: We have begun putting together video blog posts about some of the more important aspects of troubleshooting an aquaponic based system. We will be taping the various experiments as well as common procedures involved in the maintenance of the aqueduct. This should make troubleshooting and maintenance a whole lot easier

Water Quality: (11/16) With the feeding requirement increasing to 270 grams per day there have been some interesting changes that have occurred in the chemistry of the system. The nitrification rate has increased causing pH and alkalinity to fall faster and the concentration of nitrite is beginning to increase.

(11/17) The water quality seems to be remaining more stable than I expected at these higher feeding rates and pH continues to remain around 6.6 for the time being. It has been a week since adding the 350 gram CaCO3 so the system stability is still very high.

After many weeks of work the prototype clarifier for our Aqueduct aquaponic system has been completed and added to our research system.

On Friday (11/18) I received the MgCO3 and used 200 grams to observe its effects on pH and alkalinity versus the usual 350 grams CaCO3.

A drop in the temperature of the water has resulted in an apparent drop in nitrification as the nitrite levels have begun to rise again. Luckily Ammonia levels remain consistent.

Finally the 30 gallon clarifier is proving to be very effective at removing settable solids.

 

 

Topics: Aquaponics, Water