as long as we're on the subject of water umbee parameters, any of you umbee owners add any salt at all? ive been reading about salinity of south american rivers umbees are found in. Although its all fresh water, if I recall correctly the salinity of these water bodies on average is a couple ppm, wich works out to around a teaspoon per 100g. Not much at all, just wondering what long-term umbee owners add salt vs those that dont.