The answer is already in the water; the pieces just have to learn how to float.
P
P
U
Z
Z
L
.in

Condense

Fog gathers on the acrylic until a clue bead gets heavy enough to fall upward.

peg
gap
vowel
u waits behind mist
socket ≠ color
listen for click

Float

letters bend, answers sharpen

Slide the water lens across the tank. Hidden copy swells where bubbles cross the letters.

P
Z
Z
L
.in

Refract

Wrong pieces blush lotus pink, release from their cups, and sink below the useful current.

snap path armed

Sink

The .in key rises from the bottom and every socket remembers its shape.

P
P
U
Z
Z
L
A tiny portal under glass finishes the word.

Surface

PPUZZL.in

A crisp floating emblem breaks the rain skin. The puzzle was never missing; it was submerged.

solved glow