Bio Start contains biological cultures which is used to set up the essential cycles that ensure pond water is safe for fish. Each sachet contains 8,500 million bacteria to consume fish waste and will not harm any species of fish, plants or other pond life. Contain 4x9g satchels.
1 sachet (9 g) treats 2273 L (500 gals) of pond water. Simply place the contents directly into the pond or filter.