Crab ladder, designed for small Vampire or similar crabs. Designed for a ~190mm water height so the top "stage" is out of the water...resize in slicer as needed. No idea if this is good for Hermit crabs as I've never owned one.
EDIT 2024-09-16 - Posted a second model, "CrabLadder-LargerGaps.stl". This model is to accommodate the crabs as they grew larger. It's got more space between ladder rungs, no middle rungs, and a larger top observation area.
CrabLadder-LargerGaps.stl | 5.7MB | |
CrabLadderV1.stl | 7.9MB |