Blue Thumb Elite Pump Canyon Extensions Size:48" Height Independent laboratory testing confirms that

Independent laboratory testing confirms that the Ultima II filter is superior to three leading bead filter brands in setup

Hikari® Spirulina food is a superior color-enhancing supplemental diet for Koi

With inlet options at the rear or bottom of the spillway

Velvet (Gold Dust) and Saprolegniasis

Blue Thumb Elite Pump Canyon Extensions Size:48" Height Independent laboratory testing confirms thatBlue Thumb (formerly PondBuilder) Elite Pump Canyon Extensions allow you to dig the basin deeper, even as deep as 78". Extensions feature guidelines every 4" to allow for easy customization of depth. Spin weld makes installation of auto fill valve easy Fits securely to pump canyons and canyon lids Great for tight areas and pond less applications Model Small Extension Large Extension SKU PB2354 PB1977 Compatible Canyon Small Pump Canyon Large Pump