SWEET !!! The debugging stuff I was running around in My cranial container was down the Tube with the different sized Seeds and the Backfilling. I have a new piece of 1” Schedule 40 PVC that’s already paid for leftover from another project.
Have You tried a cotton ball for the tiny seed.
I haven’t tried a cotton ball. I’m not sure that would have enough weight to it.
The main reason small seeds need added weight is because the tube develops enough of a static charge that the small seeds end up sticking to it instead of sliding down. There are ways to reduce the static, but the simplest fix is to package the seeds in a way that makes them heavy enough to overcome the cling.
It’s not a problem with, say, squash or bean seeds. But it’s definitely a problem with tomato or carrot seeds!