What I used.
small tote
2 line air pump
2 - 4" Dia. air stones
.25" tubing
Nerf darts
.75 ID pipe foam pipe insulation
I have a heat mat under the tub for water temp.
That’s it.
Edit: originally I said .50" ID pipe insulation. Its actually .75". After cutting it into sections trim some off along the seam so it closes to .50". Like what would be done to make a ring fit a finger.