Stuppy Aquaponics Blog

System Update: Niles 12/13/17

Posted by Conor Quinlan on Dec 13, 2017 2:30:00 PM

Niles

 

Nitrogen (mg/L)

 

 

Date

pH

Total Ammonia

Ammonia

Nitrite

Nitrate

Temp (Fo)

EC (mS)

11/01

6.5 -> 6.6

0

N/A

0

120

Act. test

64.2

1.38

11/08

6.5

0

 

0

-

64

1.49

11/10

6.58

0

 

0

-

63

1.40

11/13

6.25 -> 6.8

0

 

0

150

73.8

1.48

11/15

6.6

0

 

0

-

75

1.57

11/22

6.5 -> 7.0

0

 

0

-

75.2

1.7

11/27

6.8 -> 7.2

0

 

0

200

70

1.6

11/30

6.95

0

 

0

-

73.6

1.58

12/4

6.6

0

 

0

-

76

1.6

12/6

6.5 -> 7.0

0

 

0

Awaiting Results

75

1.65

10/27:
Calcium Level: 44.08 mg/L     Magnesium level: 54.8 mg/L
P = 12.19 mg/L            K= 36.15 mg/L

harvest.jpg

Water Quality Overview

The change in air temperature to a range between 60-70 F has had a positive effect on water quality, particularly pH. The pH now fluctuates regularly, requiring weekly additions of K2CO3. This is very good for the tomatoes and peppers being grown in the media bed of the system; 150 grams are required about once a week. This was added along with a mix of other vital nutrients to keep nutrients levels up for the tomatoes. Super triple phosphate or STP(200g), Micro Mix(20g), Chelated Iron(70g), and MnSO4(30g) are now being added on a monthly basis. When the lab results of the water sample taken return the phosphate and potassium levels are expected to increase significantly. This will lead to a more ideal N:P:K ratio for all crops but particularly the tomatoes.

The more ideal water conditions, while promoting ideal pH fluctuations, also has significantly lowered the amount of clogging that occurs over time for unknown reasons.

Fish Overview

The Skretting feed still appears to be the best for solidifying waste.  However the fish feed was switched over to the Aquamax 4000 feed one last time to determine if the more optimal water conditions affect the waste accumulation. The switch occurred on 12/4.

The fish are continuing to grow at the anticipated rate and weigh 795 grams/fish(1.75lbs), a 115 gram increase since the last weighing on 11/7. It has been 8 months since tilapia introduction and the tilapia have surpassed the anticipated size for the given time frame. The fish can be harvested at any time from this point and will be done after the tomato crops have completed their grow cycle.

Crop Overview

Four tomato varieties and three pepper varieties continue to grow very well under the powerful LED Plessely light fixtures. There are no deficiencies detected and even the leaf curling has subsided in the Washington cherry variety. The thrip population has been brought down to reasonable levels and neem oil continues to be sprayed throughout the canopy once per week to keep the population under control. 

The first tomato fruits started to form a little over a week ago and all the varieties now have some fruit formed. It will be only a couple weeks now until the first tomato fruits are ready for harvest. Below is an image of the hybrid cherry tomato crop with formed fruit.

tomato.jpg

The first image below is from 11/7 when the seedling were producing their first flower trusses.The second image was taken on 12/06, 42 days after the transplanting occurred. The change in size is very dramatic.

media.jpgmedia_2.jpg

 The float bed was completely harvested and will be replaced by iceberg lettuce and green and red cabbage which are cold season crops.

float.jpg

Topics: Aquaponics, Insect Control, Niles, Aquaponic Supplements