Complex Ecological Network: A structure with ten intersecting entry points creates a network of three‑dimensional passages that mimic natural crevices and caves. Offers fish and shrimp plenty of routes to explore and multiple escape spaces. No Leaching, Water‑Stable: Made from hydrolysis‑resistant, age‑resistant PETG. Won’t release harmful substances even after long immersion – keeps water quality stable for healthy fish and shrimp. Breeding & Hiding – Boosts Survival Rates: Dim interior with gentle flow provides ideal space for shrimp to carry eggs and small fish to spawn. Also blocks the view of larger fish, lowering predation pressure. Easy To Rinse: Single‑mould construction with no adhesives. Place it on substrate or mix with driftwood and plants. Smooth inner walls stop residue buildup – a quick rinse keeps it clean. Need support?：Reach out via Amazon Messaging — we’ll respond soon.