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this book is the reference text for the popular Cornell University and Freshwater Institute’s Short Course on Recirculating Aquaculture Systems (RAS)
They are non-metallic and use no springs
Hose ends may be heat sealed or fitted with a plug and clamp
These 8” diameter air stones have a 3/8” barb
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D-Solv Pond Cleaner Scales this book is the referenceOxygen Powered Cleaner. D Solv will help remove attached organic debris from waterfalls, streams and rocks rapidly. D Solv works on contact to remove organic material in water gardens, ornamental ponds, fountains and other water features. D Solv does not harm fish and aquatic life and releases vital oxygen into the water as it biodegrades. D Solv also eliminates organics on a wide variety of surfaces, such as birdbaths, statues and walkways. 2 lbs
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