Preparing for a PTS next summer; meal prepping:

I have been spending the last couple months designing and now building a bioactive tropical terrarium. After going back and forth about what to house I have decided on a PTS and plan to get the terrarium up in running in the next couple months and letting it mature and plants grow in til litters pop up next spring/summer. I already have a pretty robust colony of ramshorn snails going in my 33 g shrimp/community tank which I am now actively supporting rather than trying to eradicate given that PTS like snails. While I also plan to supplement with canned snails, repashy insect foods and silk worms (if interested) are there any other snails I should think about trying to start colonies of? I also know that grain free dog/cat food and scrambled eggs are options, but those seem less than ideal if I can get it to eat some better options.