I've made some videos detailing the setup and construction process.
- Bottom has a perforated 1/2" pvc pipe with an elbow up to top
- bottom 2 inces has 3/4" gravel
- above that is 2 inches of 1/4" gravel
- 10" above that is 0.3mm sand
Type of sand to use: We sourced our sand and gravel from sepulveda building materials on Waterman street in San Bernardino. The staff there are helpful in selecting the correct grain size of sand and gravel. .
Videos to detail the actual experiments will come in a later vlog / blog.