1 M or m â prefix designating a number in thousands (not to be confused with SI prefix M for mega-or m for milli).
There are two types commonly referred to as: 'Shallow' and 'Deep' water. The differences are not only in the Frequency but also in the Beam Width and they are as follows: 'Shallow' water HST-WSBL 106-72 Transducer will operate on 2 frequencies on the HDS models: 200 (20Â°) & 83KHz (60Â°). 'Deep' water HST-DFSBL 106-77 Transducer will operate on 2 frequencies on the HDS models: 200KHz (12Â°) & 50KHz (35Â°).
How does Water Temperature Affect the Respiration Rate of Goldfish. Goldfish do best in water temperature around 60 degrees Fahrenheit (15.6 degrees Celsius) but can thrive in a wide range of temperatures from 50 to 68 degrees F (10 to 20 degrees C). Itâs best to keep a thermometer on the aquarium to check the temperature.