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Re: More musing on water change.

Al Anderson wrote:
> The best changes are done with a system that lets a constant flow in and
> out.
> The best commercial hatcheries do it this way.

Isn't that just the limiting case of smaller and smaller partial changes 
with higher and higher frequency? It then becomes a question of how high 
the flow rate (gallons/day) must be to keep the contaminants below some 
defined threshold.

100% changes are rarely practical in a commercial hatchery. That could 
be a *lot* of flopping fish waiting for the new water. :-)


"Deport all the product-liability lawyers to Iraq;"
                                 -- Dave Barry --
       [Best suggestion of 2002, by far...]

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