Your right!

I sprayed ACT (bacteria based) on garden last summer, many I know that had gardens had a tomato disease and the plants died. My broccoli grew over 2 feet high with zero failure rate on any plant in the garden. I found a FREE 200 gallon sauna and pulled a air blower out of it then made tea with rain water and sheep compost. Sprayed it on garden,lawn and some young trees.

2010 I updated this thread
I see yet another business advertising hydroponic plant food using bottled worm tea? Or what ever it is so far I am not convinced that it works in water based systems.

Seems better to have worms already in the bed producing castings that turn into a food as the water breaks it up and dilutes it than to try and use a the worm tea product as the only nutrient for growth. Besides it will develop a film slim inside chambers of the system.

Wormswork Liquid Concentrate
http://www.wormswork.com.au/home_garden/index.html