GreenClean Algaecide, 8 lb. Beneficial Bacteria (Koi Ponds & Water Gardens) 12" extension has a flange

12" extension has a flange around bottom that slides right over the top edge of the mini & small vault

This Black Plug is a replacement piece for the 1/4

A bag of Bio Balls weighs approximately 8 pounds instead of Lava Rocks 40 lbs

See the Aquathol K Label instructions for details

GreenClean Algaecide, 8 lb. Beneficial Bacteria (Koi Ponds & Water Gardens) 12" extension has a flangeThis popular product is designed to treat algae in both small garden ponds and large earth ponds. GreenClean works through oxidation, which provides immediate control of algae and complete biodegradation. There is no residual heavy metal from the product, which makes it ideal with copper sensitive species like Koi and Trout. Completely non hazardous to fish & plants, this product is registered with the EPA and is Organic certified by Organic Materials