Fish Accessories-Koi Kastles Koi hide inside, protecting them from predators. Sits on the bottom of the pond. Aluminum frame and fiberglass mesh. Also provides shade on sunny days. KK-01 KOI KASTLE 9 X 18 NYCON KK-01 KOI KASTLE 9 X 18 $24.99 SKU: NYCKK01 Click here to save 5% off of your order! KK-02 KOI KASTLE 12 X 24 NYCON KK-02 KOI KASTLE 12 X 24 $30.75 SKU: NYCKK02 Click here to save 5% off of your order! KK-03 MOLDED KOI KASTLE NYCON KK-03 MOLDED KOI KASTLE $30.75 SKU: NYCKK03 Click here to save 5% off of your order! POND REEF POND REEF $29.25 SKU: WPPR1 Click here to save 5% off of your order!