Savio Pond Free® Blocks with Riser Model:Riser Assembly (No Block) OxyTex is a perfect supplement

OxyTex is a perfect supplement for any Oase filter

Built-in air relief valve and pressure gauge prevents filter failure

and all required wiring components

aeration is necessary to leave a hole in the ice for gas exchange and oxygen transfer

Savio Pond Free® Blocks with Riser Model:Riser Assembly (No Block) OxyTex is a perfect supplementThese modified Savio Pond Free Blocks feature a Block Riser that opens up new possibilities for small waterfalls and streams. Great for monument spillways and small fountains. You can also use the riser as an entry point into the Pond Free Block, allowing you to keep a pump inside for optimal protection from crushing. If you are looking for a regular Savio Matrix block without the Pre Cut use this line as a link. Block measures 27"L x 18"D x 17"H,