[Hydroponics] Moving the outdoor PVC pipe system indoors and getting it working again.

Using an entire wall of the room, we will try hydroponics using PVC pipes.
The PVC pipe with holes for planting seedlings was not operational in the summer of 2020, but now it is operational and lettuce is growing like crazy.

Preparing to dump the circulating water and bring the equipment into the room.

I would like to move the hydroponics equipment that was experimentally set up outdoors indoors and practice indoor hydroponics in earnest.
The structure of the cultivation system is a PVC pipe, a washing drainage hose, a water storage tank (substituted with a cooler box), a pump, a 12mm inner diameter water hose, a stand (container), a sponge, and seedlings.
The PVC pipe is wrapped with a silver leisure sheet to prevent the water temperature in the pipe from rising too high.
However, in reality, the circulating water temperature was over 30 degrees Celsius when it was set up outdoors in the middle of summer, so it might be better to wrap the leisure sheet than not to wrap it.
After dumping all the water in the PVC pipe and the water storage tank, we were ready to start moving.
To watch the video, click on the link below.

Here you go.

Setting up the unit, PVC pipe, and water tank in the room

Line up the unit, PVC pipe, and water tank in the same way as for the outdoor unit.
We want the water to drain automatically when it reaches a certain level, so we need to place the water tank below the PVC pipe.
Keep the end of the hose inside the tank so that the water that drains from the hose returns to the tank.

Set the small tomato and lettuce seedlings in the PVC pipe.

After setting up the stand, PVC pipe, and water tank, the next step is to set the seedlings in the holes that we cut out.
It’s hard to tell from the picture, but the roots of this lettuce are about 30 cm long.
The roots themselves are white and beautiful because they are grown without soil, only water.
If you put the lettuce in the hole as it is, it will wobble and fall down, so wrap a sponge around the stem to make it a little bigger than the hole, and then insert it to hold it in place.
If you are using seedlings in pots with soil, which you can often find at home centers, fill a bucket with water and wash the soil gently.
When all the soil has been washed, wrap it in a sponge and insert it into the hole in the PVC pipe.

Install a pumping pump in the water storage tank.

Install a pumping pump in the installed water storage tank.
Without it, you can’t start anything.

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Connect a hose with an inner diameter of 12mm to the water supply side, and put the hose into the inlet of the PVC pipe.
The size of the hose is perfect, and I’m sure I’m not the only one who gets frustrated every time when connecting it…
There is a suction cup on the bottom of the pump body, so you can fix the pump by simply pressing it against a flat surface inside the water storage tank.

Making water with liquid fertilizer to achieve an EC value of 1.3

I’ve dumped the water in the PVC pipe and the water storage tank outside because it gets very heavy when moving it, so I’ll make water with liquid fertilizer again.
The reason why I set the EC value (like liquid fertilizer concentration) to 1.3 μs/cm (microsiemens) is just because many people do so.
I’ve heard that it’s better to change the concentration according to the growth of the vegetables, but for now, I’ll stick with the EC value of 1.3…
The above article explains how to make concentrated liquid fertilizer for the OAT (formerly Otsuka) house.
Adding 50cc each of No. 1 and No. 2 concentrated liquid fertilizer to 10L of water will produce water with an EC of 1.3.
Depending on the capacity of your water storage tank, you can make water with liquid fertilizer several times.
In my case, I made 40 liters of water 4 times in total and put it in the water storage tank.

Turn on the pump to circulate the water.

Let’s quickly turn on the pump.
Water will be sent from the pump submerged in the water storage tank.
When the water level reaches a certain level, it will be discharged from the drainage hose.
The drained water comes back to the storage tank and is pumped again.
All you have to do is to add water with liquid fertilizer again while monitoring the EC value as the roots of the vegetables absorb water and the overall water volume of the hydroponics system decreases.
The hydroponics system has now been moved.
I just moved the one that was able to operate normally outdoors to indoors, so I don’t have any problems with it.
The mini-tomatoes haven’t turned red yet (there are green fruits), but as for the sunny lettuce and leaf lettuce, they grew quite well in the outdoor cultivation.
I was able to tear them off and serve them on the table every day, which greatly increased my chances of eating lettuce.
Now that we have moved the equipment indoors, the lack of sunlight is going to become a problem.
I wonder how much I can grow using LED fluorescent lights, …

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I haven’t received the product yet, but I’m looking forward to it no matter what.
So long.