Feb 21, 2008. #1. gainesvillegreen Registered+. It really depends on the contents of the water more than the actual TDS levels; however, I would say the 250-300PPM area for tops. I have used it higher (400PPM) with no problems though, so... Feb 21, 2008. #2. herbie the love bud Registered+.
By Jennifer Rosenberg. The Zimmermann Telegram was a coded message sent from German Foreign Minister Arthur Zimmermann to Germany's ambassador in Mexico, Heinrich von Eckhardt, in January 1917. The British managed to intercept this coded message and were able to decipher it.
The first telegram in the United States was sent by Morse on 11 January 1838, across two miles (3 km) of wire at Speedwell Ironworks near Morristown, New Jersey, although it was only later, in 1844, that he sent the message  WHAT HATH GOD WROUGHT  from the Capitol in Washington to the old Mt. Clare Depot in Baltimore.