| Scott,
Interesting.......
I suffer with shimmies as well, a great looking Hasegawa Kohaku had 7 at the last count. Hav now stopped buying Kohaku's because of the Shimies, Sank'es and Showa's maybe I can get away with the odd shimie.
I trickle in 500 gallons a day to overflow (no water meter!), turnover 8500 gallons an hour of my 10000 gallon pond and have increased the air to 305 litres going into pond and filters. Nitrates are below 10, but still get the shimmies!!!!
Soon I'm going to add a metals removal cartridge to my incoming water purifier, see if that does anything. Metals are not high, but am running out of ideas!
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Regards, Bob
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