I am very new to "ponding". I enjoy it tremendously. This year, something must be up with my water as the koi are "flashing". The test kid shows that everything seems fine except my Alkaline level is at 0! It also shows that I have very soft water. I have lost 2 fish this week! My pond is about 60 gallons (both containers together). Is there something that I can add to raise the Alkaline? I'd really appreciate any advice. I've attached a picture just so you can see the setup. Thanks in advance.
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