Alder Cones — Tannin-Packed Micro Pods for Vivariums & Tadpole Setups Description: Super cool, super cute little tannin-packed cones that bring both function and charm to your build. Alder Cones are micro pods that release tannins into the water — making them a go-to for tadpole setups and bioactive enclosures alike. Why keepers love alder cones: Tannin release — Naturally releases tannins into water, creating the soft, acidic conditions tadpoles and shrimp thrive in Microfauna favorite — Gives springtails, isopods, and other microfauna a place to hide and thrive Perfect for small enclosures — Sized right for nano builds, small vivariums, and detailed hardscape work Natural hides — Inverts and small vertebrates use the crevices as secure retreats Bioactive-friendly — Integrates naturally into leaf litter, moss, and substrate layers Best for: tadpole setups, dart frogs, tarantulas (especially slings), dwarf isopods, other invertebrates, and small reptiles and amphibians in nano and small bioactive setups.