This is a phrase that keeps coming up that is completely misunderstood by the one using it. Let's look at the phrase in it's Biblical context: 1 Corinthians 3:3-7 For ye are yet carnal: for whereas there is among you envying, and strife, and divisions, are ye not carnal, and walk as men? For while one saith, I am of Paul; and another, I am of Apollos; are ye not carnal? Who then is Paul, and who is Apollos, ....
The members of the church at Corinth were debating who had the best Christian experience. Some were saying they were better believers because Paul had led them to Jesus. Others argued they were better off because they grew more through the preaching of Apollos. Paul clarified their wrong thinking by showing praise isn't based on who leads a person to saving faith. conversion, or the first changing of souls; another is used for edification, or further building up of souls; but both conversion and edification are infinitely more from the new heart and new nature, which God giveth to souls, and from the influence of the Sun of righteousness by the Spirit of grace, working in and upon the soul, than from any minister, who is but God's instrument in those works.
I don’t believe there can be any other legitimate explanation of "Apollos waters".