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Re: currents in a mud pond

Posted by Fishbreeder on 10/29/2009, 2:27 pm, in reply to "Re: currents in a mud pond"
72.171.0.148

You gotta git past the back of the fish house.... No, its been a long time since I was last in Japan. Yet, a mutual fish farming friend comes to visit annually and we talk a lot about farming fish (not just breeding koi). I might know one person who speaks English as a first language who understands koi more'n you, just one. But, that is not the same thing as understanding fish farming. In Japan, many, many, many koi breeders (as well as other types of fish farmers) subscribe to a service not offered to fish farmers in the US. An "aeration service." The service providers set up and manage the aeration devices (primarily paddlewheel aerators) for the farmers. One less thing to worry about. The service provides maintenance and repairs as needed without having to bother the farmer. These aerators are primarily to even out daily oxygen budgets (prevent low DO at night in order to aid digestion). However, in the process of aerating, they also provide currents that mix the aerated water with the rest of the water in the pond to keep the DO up and evenly distributed. Plenty of such customers are koi breeders. Next time you are with one of them, ask about it. Now I know it was long ago....but I saw plenty of ponds with electricity, even on the mountainsides. Some that were "off grid" had their own generators located nearby (hidden by bushes or in a shed). I'm sure the earthquake changed some of that, but difficult for me to imagine Japanese going retro with respect to basic utilities and basic fish culture technologies. Indeed I also saw plenty of ponds very far from any utilities. Yep, indeed those ponds had extremely low stocking densities (I figured some at around 15 to 20 fish per surface acre). But even those were exposed to wind and rain. Most spring fed with poly pipes that had been "pushed into the ground where the spring was" to direct the flow to the desired pond. You cannot prevent the formation of currents even in these ponds. When it comes to koi appreciation and koi keeping, I defer to you and others. But, how many of you are PAID consultants to Japanese koi breeders? Brett

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