An indispensable tool for your Koi pond. A salt bath done for disease prevention is usually done at a 0.3-0.7% ratio, but with this densitometer measurements of up to 0.01% are possible, making it both convenient and safe. [Digital salinity densitometer Specs] -Measuring range 0.01-1.00%¡Ê0.1-10ppt) -Analysis unit 0.01%¡Ê0.1ppt¡Ë -Measurement precision ¡Þ0.03%¡Ê¡Þ0.3ppt¡Ë -Measurement temp. 0-50¡î -Power source 1.5V button electric battery (LR-44) ¡ß4 -Battery life more than 150 hours |