None of my bibles say "again" in verse 5:
Water baptism is not necessary. See Acts 16:29-31.
Those Bibles would be abridged, edited, Protestant versions, correct?
Matthew 3:11 "I indeed baptize you in water unto penance, but he that shall come after me, is mightier than I, whose shoes I am not worthy to bear; He shall baptize you in the Holy Ghost and fire."
Matthew 3:16 "And Jesus being baptized, forthwith came out of the water: and lo, the heavens were opened to him: and he saw the Spirit of God descending as a dove and coming upon him."
John 3:5 "Jesus answered: Amen, amen I say to thee, unless a man be born again of water and the Holy Ghost, he cannot enter into the Kingdom of God."
John 4:10 "Jesus answered, and said to her: If thou didst know the gift of God, and who he is that saith to thee, Give me to drink; thou perhaps wouldst have asked of him, and he would have given thee living water."
Titus 3:5 "Not by the works of justice, which we have done, but according to his mercy, he saved us, by the laver of regeneration, and renovation of the Holy Ghost."
1 Peter 3:20-21 "Which had been some time incredulous, when they waited for the patience of God in the days of Noe, when the ark was a building: wherein a few, that is, eight souls were saved by water. Whereunto baptism being of the like form, now saveth you also: not the putting away of the filth of the flesh, but the examination of a good conscience towards God by the resurrection of Jesus Christ."
Water baptism is not necessary. See Acts 16:29-31.
Your opinion only and a case of linguistic literalism. Acts 16:29-31 is not all inclusive. Belief alone is not enough.
Matthew 19:16-17 "And behold one came and said to him: Good master, what good shall I do that I may have life everlasting? Who said to him: Why askest thou me concerning good? One is good, God. But if thou wilt enter into life, keep the commandments."
Acts 16:33 "And he, taking them the same hour of the night, washed their stripes, and himself was baptized, and all his house immediately."
All references Douay-Rheims.