Unicel 4CH-21 | 19 sq ft Saratoga & Vita Spa Filter Brand_Ooni Add 4 tsp of Brominating

Add 4 tsp of Brominating Concentrate per 200 gallons of spa water

Dimensions 23 1/2" x 10"

This is a replacement main LED light for hot tub spas and Endless Pools

1 x DuraVent 4PVP-T PelletVent Pro Tee - 4"

Unicel 4CH-21 | 19 sq ft Saratoga & Vita Spa Filter Brand_Ooni Add 4 tsp of BrominatingThe Unicel 4CH 21 is a compact 19 square foot top load replacement cartridge for Saratoga, Vita, Dream Maker, and several other spa brands, replacing OEM part numbers 20245 238 and PVT 25N. At just 8" tall and 4 5 8" across, it is one of the smaller cartridges in the top load family and it packs 158 pleats into that short body, a genuinely dense fold count for its size. The bottom carries a 1 1 2" male pipe thread that screws directly onto the suction