Since we have our pond indulged a completely new filter system this year, we also took advantage of the first time the Oasis starter bacteria. We had previously made us a little on the internet and really clever you can also not go far wrong. The granules are poured into the designated filter chamber and then we have to wait :) Now, after two weeks we look forward to a clear pond and good values. Whether this is solely attributable to the starter bacteria I can not say, because, as I said also the complete filter package is new unfortunately. However, I think that must be kept the really good water values in any case it returns. We find the price uin order and I think we will use them again in the coming year.