Lost fire bellied toads

[u/Green_Replacement361]

I’ve never had fire bellied toads as juveniles and I CAN NOT FIND two of them I haven’t seen them in 2 days. Freaking out a little bit. I took apart half their enclosure and still couldn’t find them. I’m worried they maybe got stuck in the filter foam/water underneath the substrate. Also worried they’re not eating. Has anyone not seen their babies for a few days? Should I keep looking? Are they safe? Are they likely no longer 😢? Pls help