Underliner Vent System, 150 foot roll Koi Ponds & Water Gardens (Air Systems) Fish safe aquatic herbicide

Fish safe aquatic herbicide

Flexible - Pond Shield remains flexible from 78 to 140F

Increases alkalinity and decreases acidity

You won’t find a better Koi Grower diet anywhere

2 year warranty

Underliner Vent System, 150 foot roll Koi Ponds & Water Gardens (Air Systems) Fish safe aquatic herbicideThis Underliner Vent System helps protect pond liners from damage caused by methane gas and water accumulation beneath the liner. It is a prefabricated 6 inch strip consisting of a molded grid wrapped in geotextile fabric to permit a high flow of water into the grid while restraining soil particles. By simply laying a strip of Underliner Vent on the ground before installing the liner you can prevent costly future problems. This easy to install system