Faux Rock Fish Cave, 30 x 18 Inches, for Koi and Larger Fish The Aquascape Faux Rock Fish Cave 30" L x 18" W (76 x 46 cm) is a larger-opening cave for koi, larger goldfish, and multi-fish sheltering. The 30 x 18" footprint provides enough interior volume for adult koi to enter fully and remain inside, which smaller caves do not always achieve. Full-Entry Shelter for Adult Koi Adult koi in the 40 to 70 cm range are too large for caves designed around smaller fish. A cave that a fish can only partially enter provides limited comfort and minimal predator protection. The 30 x 18" cave accommodates full-body entry for koi up to typical pond adult size, making the shelter functionally effective rather than decorative only. Spec Value Dimensions 30" L x 18" W (76 x 46 cm) Material UV-resistant resin composite, safe for submerged use Finish Field stone texture, grey-brown natural tones Safe For Koi, goldfish, aquatic wildlife How to Use Rinse thoroughly before placing in the pond. Position on the pond floor at a depth that allows adult koi to reach and enter the cave comfortably. Larger ponds may benefit from two caves positioned at different areas. Remove during annual cleanouts to clear accumulated sediment from the interior. Pairs with the 25 x 15" version (AQ-78418) for multi-cave installations. Ideal for ponds with adult koi 40 cm and larger, where effective full-body shelter is needed for stress reduction and predator protection.
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