The oxygenation sensor this is intended to test takes 5-10 minutes to
settle; we want to test it over 72 hours or so.

Accuracy in temp is unimportant, really, just so long as it doesn't get TOO
hot.  All we need is a heater that is capable of heating the aquarium to
50C which can be controlled by some programmable means.

Mike H.

>My guess is it would take about 2.5 hours for a 2000W heater to bring the
>tank from 0 to 50C. For slower, use a smaller heater, and stir. You can
>achieve 0C by putting ice in the aquarium until it stops melting. If you
>want slightly less than 0C add some salt first. Would this be slow enough
>? If the tank walls are insulated with polystyrene it could take two days
>to go from 0 to ambient.
>
>Peter

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