Envirex Biological pond cleaner, 400 grammes

Envirex powder works quickly to breakdown all watse products such as ammonia and nitrite.

Ideal for use in new ponds or when filter performance is reduced in mature ponds

New pond dose 80 g to 1000 gals mature pond 40 g to 1000 gals

Then a regular maintenance dose of 5 grammes per 1000 gals every 3 to 4 days