Nart is our source for cheato LOL. But seriously, I'm getting some, Stella's got it from him, I know someone else did too. I know that its pest free and clean because I know he wouldn't send us contaminated stuff. But I went to my LFS and they had it in a dirty tank with aiptasia and they were asking $20 for a small baseball size!!? Like seriously?
I'm planning to ship some chaeto out tomorrow. Let me know if you want some of my chaeto.
I'll ship it USPS Priority mail small flat rate box so nothing gets smashed, $7.15 before tax... let's just say $10. If you'd like.
If you want from like a retail company, try AlgaeBarn. I've bought pods and phyto from them. Great stuff. They also sell chaeto too. So you can probably buy chaeto, pods and phyto off them. Since I know you were looking for pods to increase to bio-diversity last time.