After these things, Jesus went away to the other side of the sea of Galilee, which is also called the Sea of Tiberias.
Regarding the allegation of discrepancies between John and the other Gospels in the narration of this wonder, it should be remembered that if the Gospels had been mere verbatim accounts there could have been no advantage of four independent witnesses.  All of the alleged "contradictions" are easily explained through a little study, or would disappear completely if all the circumstances were known.  As William Taylor's quotation from Alford indicates: