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Re: balls

>> Make into known volume sized balls.
> Weren't/aren't the Duplas something like that or are those
> NO3 free?
> Scott H.

Dupla add NO3 or PO4? That would be blasphemy!

I don't know really, I no longer use anything by them.

Paul's idea works well for vacations. I do know the nutrient agar diffuses
at a rather steady rate.

Tom Barr