Photo by Nate Steiner (Flickr) How much salt do you need to keep your goldfish alive and paddling? It depends on what you’re using the salt for. If you want…
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aquarium salt
Photo by Dubravko Sorić (Flickr) “Water, water everywhere and not a drop to drink.” You might know this quote from The Rime of the Ancient Mariner. A man is adrift…