I vote for BZT - you can buy it online:
www.united-tech.com

or telephone:
916-610-5205
Ask for Aquaculture... then mention the Ponders Special.

Good Luck!

Nedra in Missouri
http://www.geocities.com/Heartland/Pines/4836
http://community.webshots.com/user/nedra118

"matrix" wrote in message
...
Just wondering which bio-bacteria was the best or proven in your
ponds?..Also the best place to buy it?

I am going enlarge my pond this summer and will need a boost for my koi.

T.I.A.