Blagdon Pond Bio Start carton.

Fish disease and death often result from poor pond water quality; caused by fish waste building up to toxic levels. This dangerous condition typically occurs in new ponds and in the spring. At these times the biological cycles required to remove fish waste have not yet been established. Bio Start contains biological cultures which within hours begin to set up the essential cycles that ensure pond water is safe for fish.

Use only as a pond treatment.  Treats 9,000 litres (2,000 gallons)