That is not a bathroom crevice that is a canyon.
You can not stop water from flowing in a canyon unless you build a big ass dam.
But before that WTF is going on in that tub? HOLY SH!T was my reaction. Nice tile, good quality tub (I can tell its cast iron) and egregious small mistakes. WOW!!
Let me give you the John Madden teleprompter rundown.
#1 - ...