What do you mean ?
I hope you not thinking that some sea water would melt\dissolve the candy .
Plus Perospero is there so he can make more if that happens .
Took me too long to see someone else bothered with the candy working on water.
Seawater should cancel devil fruits power. That is why Jinbe said it was impossible even for her. Maybe create candy and leave it at sea is something, but making it move is a very long stretch…
Plus, how deep is the ocean? Maybe he had time to make all that candy but sea was supposed to be the weakness for every devil fruit user, now they can become god, by awakening, and produce as much as they want to stay on sea?
I NEVER complain, but did not liked this.