As the previous blog post explains there were a number of improvements made to the Aquaponics system this season. In addition to a new type of filtration system, an Ebb and Flow system, as well as an Aeroponics system was added. It is currently the end of the season and while there are always adjustments that can be made I can confidently say all of the additions were successful. You can see pictures in the previous post or you can watch this short video below for some additional images as well as a somewhat rambling explanation of what is going on. Enjoy.
It has been a long time since there has been a blog post but there has been a lot of activity. After another successful winter it was time to come outside again and to get to work. There were several things to work on, 1) To have another successful roof garden with some improvements. 2) To improve the outdoor aquaponics systems filters. 3) to improve the vertical aqua piping 3) To develop an Ebb and Flow system 4) To create an Aeroponic system on the 3rd floor.
Lets start with the container garden. It is going great so far and this season has yielded quarts and quarts of Strawberries, pints of Blueberries, lots of lettuce, carrots, radishes and herbs as well as collards and beans. We are moving into tomato and pepper time and that makes me very excited!
2013 Aquaponics system
Another year and more improvements to the outdoor Aquaponics system. This year I added a whole new level and some new ways of growing. As you will see the fish are still in a 275 gallon IBC tank under the stairs. That water now pumps up to the roof of the second level where it goes through a 2 stage filtering system (through a 30 and 20 gallon adapted garbage cans) at that point Half the water come out and flows into the system that runs along the side of the house. This continous flow of water also filters the water and helps re-oxygenate the water for the fish before it goes back into the tank. In the second stage of the filter is a pump and every 7 minutes that pump comes on for 30 seconds and pumps water up to the 3rd floor deck where you can see I have built a new system. That system is an aeroponic system that is basically gutters with small pipes inside with sprayers, so it sprays the roots of the plants. That water all drains into one pipe which them comes down to a tub that you see next to the filters. That is an ebb and flow system. So essentially every 7 minutes that tub fills half way with water and waters the plants in there before draining back into the Fish tank. Last year I had about 50 grow holes or units, this year I have over 200! And these different types of growing are better for different types of plants. it is a lot of fun. In addition I have about 50 Tilapia that are over a pound now and will be 2 pounds each and perfect for eating in the next month. Come on down!!!
Not only has Hurricane Sandy been through the area but Fall has arrived and with it are much colder temperatures. I still have fish outside and plants growing in the outdoor system but it is about time to shut things down in the next few days and focus on the indoor system. The outdoor system was incredibly successful this year yielding nearly 100 pounds of fish and large amounts of veggies and herbs throughout the season. A lot was learned as the system was expanded and the growing season was expanded to a 6 month period of time. This will be a long post that will focus on harvesting the fish so that you can see the fruits of our labor.
I first want to make the point that in addition to this system providing food it is also a fun way to learn about some scientific concepts. Part of the simple maintenance is that I regularly check the water for Ph levels, Nitrate levels and so on. I keep tables of the results and make the necessary adjustments when change is needed. It is fun to see how minor changes in anything from water levels, to the number of fish or plants can have impact on the condition of the water.
These pictures and Video are actually from the end of September. I knew that cold days were coming and wanted to harvest a number of the Tilapia before it got too cold at night and I ran the risk of losing them. I have worked with 55 degrees at night threshold being the temperature that I wanted to think hard about pulling the fish. Of note is that I left about a half dozen fish in the tank over the past month and we experienced several nights below 40 degrees. While I wouldnt suggest pushing your luck too much im happy to report that though the fish were lethargic all except one survived.
This first video is of catching and then killing a Tilapia. While this is simply the process by which fish are harvested, this may be too graphic for some people so those of you who are a bit squeamish might choose not to watch this one.
After the Tilapia are caught and killed, I take a few minutes and I weigh and measure each fish and record that data. I am tracking growth rates of these fish starting from when they are 1/4 inch fry and ending with being 2 pound, 14 inch mature fish 18 months later. This video shows several fish being weighed and measured.
One interesting thing that you witness when harvesting the fish is that there is a good chance that several of the fish either have recently laid eggs or are carrying fry. Tilapia are mouth breeders so after they lay eggs that are then fertilized, the females then carry the eggs in their mouth until they hatch. In this picture (again might be a bit graphic for some so I am making it small but you can expand) you see that after harvesting this fish I realized that its mouth had been full of eggs.
The other thing you might find is a female who is carrying a mouth full of fry. In this video you see just that. After catching this female and discovering a mouth full of fry, instead of killing it, I moved it (and the fry) into the Indoor system.
After catching and killing the fish the next step is gutting and scaling. This can be a pretty quick process with the right tools. These photos and the video show the end result of this process.
Even though it was hot and dry at times, it has been a lovely summer, . The Gardens and Aquaponics have all yielded much of their bounty at this point and have made their contribution to the great summer. As the temperatures drop it is time to think about pulling up and turning over the garden, as well as planting a few winter crops like garlic, onions and potatoes. It is also time to close down the outdoor Aquaponics system and focus on the indoor system. Much of those activities will be discussed in future posts but there is still plenty to talk about now. This post is a long one so Im going to break it into three parts.
The rooftop garden at this point is an unruly beast but it continues to produce some items like grape tomatoes and lots and lots of cayenne peppers. These pictures were taken during the first week of September 2012. You can also see that the Outdoor Aquaponics system is going along quite well. Lots of Basil, Chives and Cilantro in the vertical section. One pic also shows the amazing root growth the plants have in the vertical section. In the horizontal section you can also see the abundance of Tomatoes, Eggplants (on top) as well as all sorts of lettuce
Someone like myself can be a bit simple minded at times. So when I had some young visitors who wanted to see the garden, I mistakenly apologized and said there was very little to see as the growing season was over and the harvest had taken place. Within moments I was proven wrong when those that looked not through a narrow view but through wide eyes, found garden inhabitants that were just as exciting (if not more so) than any Tomato, Caterpillars!
Finally I wanted to share a few summer harvest meals. Im not sure if there is something that is better than a simple and fresh meal like we are able to produce ourselves. An appetizer of fresh carrots and celery; a lovely simple compound salad; a main course of grilled Fish, roasted peppers, onions, tomatoes. Desert of Raspberry sorbet. Good stuff.
Another favorite of mine once the peppers are ready is a simple meal of Fajitas, made with fresh herbs, bell and hot peppers, tomatoes and onions from the garden.
And as the weather changes and the cravings for heavier foods enter into my cravings I like to take advantage of the garden and make a large pot of Chili, filled with Tomatoes, and Peppers (bell, cayenne, habanero) from the garden.
Finally I love pizza and therefore I grow San Marzano tomatoes as well as basil, oregano, and garlic. When the tomatoes are ripe, I pick and prepare them (blanch, peel, core and chop) and freeze them in individual packages. I simply thaw add fresh garlic, salt and pepper and my sauce is complete.