I posted in 2017 in wikipedia, a substrate aeriation alternative for Drosera capensis.

"Drosera capensis ,,Alba,, growing in peat moss and airsoft pellets 50 - 50 mix, under artificial lights, as a alternative to sand or perlite aeration"

We can use airsoft pellets, chiped or not, so why not pick up your used airsoft pellets, thus sparing the usage of perlite and sand ?

Another good way for nature protection is that we won't trow away or leave the airsoft pellets in nature lying around, after a game of airsoft.