Orenda CV-600 Enzyme Water Cleaner, 1 Gal Bottle | ORE-50-134 Lamps & Light Bulbs They are 4

They are 4

This is the 150 sqft filter model

It's available in 1

Liquid Temp Range: 32°-120°F **Ensure removal of the cover pump during near freezing temperatures to prevent pump damage

Orenda CV-600 Enzyme Water Cleaner, 1 Gal Bottle | ORE-50-134 Lamps & Light Bulbs They are 4Size: 1 gal Bottle CV 600 enzyme water cleaner is a unique, stabilized enzyme that effectively breaks down and digests non living organic waste and oils in water. These carbon based contaminants are commonly found in pools, spas and other recreational water. Without an enzyme like CV 600 (or CV 700) , organic waste needs to be oxidized to be removed from water. The disinfectant gets reduced oxidizing bather waste, so using a secondary oxidation system