Products and tools used in this video
Tetra Test O2: https://ebay.to/2oO8gK1
aeration ring: https://amzn.to/2HqZTdj
air hose: https://amzn.to/2ZvFzlk
airline T-connector: http://s.click.aliexpress.com/e/lvgEgKe8
folding tank: https://amzn.to/2U2hsFK
pocket knife: https://amzn.to/2HqeyWg
air pump: https://amzn.to/2U6sqtH

4k Gopro: https://amzn.to/3878qAx
Gopro head strap: https://amzn.to/2XzhR7A
Gopro bicycle mount: https://amzn.to/2xDfK3l
Tripod: https://amzn.to/34NcAvm

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Hi this is Carl the Landscape Guy. Most of you already know about my 3000 square foot pond. And for a few years now, the size and number of Koi are constantly increasing, especially due to the offspring. I feed the Koi in summer with the power food from Wa-Shin. It contains 45 percent of protein and ensures really good growth. In a natural body of water the fish population would be naturally regulated by predators. But at my pond, I keep possible predators away with the Cormoran net. This allows the fish to lead a rather carefree life. However, I have to be careful that the pond doesn’t become overstocked. This can have a particularly negative effect on the oxygen content of the pond water. Not only the fish themselves, but also the microorganisms depend on oxygen to break down the fish excrements. This means that if the oxygen levels are too low, the fish excreta such as ammonium cannot be broken down quickly enough by the microorganisms. In worst cases, this can lead to the excessive formation of ammonia in the water, which would destroy the gills of the fish and ultimately kill them. So that it does not get to that point, I will measure the oxygen content of the water today. For this I’m using the Tetra Test O². I take a bucket of water from the pond. And 15 milliliters of water go into the sample tube. Next I add 5 drops from the first bottle and then 5 from the second one. Close the sample, flip it once and wait 30 seconds. Then add 5 drops from the 3rd bottle. Mix it again and the water should turn reddish. The stronger the colour, the more oxygen in the water. So this sample is about three milligrams per liter. If the pond water is not quite clear, as it is here, then it can make reading the results a little difficult. However, the oxygen content in the pond water seems quite low. At the moment the water temperature is 71 degrees Fahrenheit. During the summer right now there is less water in the pond, which can worsen the situation if it gets even hotter. Therefore I decided to install an air pump with an aeration ring. The Aquaforte aerator ring is weighted with stainless steel pieces and connected to the airline with a T-piece. In another video, I used this AP-150 aerator pump for a short time to aerate a holding tank for the Koi. That had worked very well. This aeration system is available in different sizes and this aerator ring has a diameter of 30 inches. Now the system will be used in the pond. To test it out first, I’m temporarily using an extension cord reel. If the pump does what it claims, then I intend to lay an underground cable. Now of course, I need a long hose because the aerator ring will be placed at the deepest point in the middle of the pond. With the stainless steel weights the ring is quite heavy and I intend to throw it the last couple of meters, so that I don’t have to get in all the way. I excavated the pond myself, so I know about where it gets deeper. Ok, that worked and now I position the hose reasonably straight towards the edge. I put the pump at a higher level close to the pond. I also put a pavement slab underneath it, so that it’s stable and doesn't suck in dirt. Now I lay the hose up to the pump. It is about 12 meters from the aerator ring to the pump. The shorter the hose, the better, because compressed air causes high friction in the line. Nevertheless I leave the length of the hose as it is for now, because this is to test if the aeration can measurably increase the oxygen content in the pond. Ok then we can start it. It looks like it’s coming out well. The hose is about 5.5 feet deep. And the pump has a of 40 gallons per minute. For the output, the pump is not really loud. I use a mason bucket to temporarily protect the pump from rain. This is practical because both the extension cord reel and the pump fit well under it. So I let the aerator pump run 24 hours a day for one week. At the moment the weather is quite stable and it has not rained either. So I am now curious about the second oxygen test.
#Pond #Koi #aeration