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>Thanks Harvey for the added info.
>
>
> Walmart has a bread container that's inexpensive and makes a good
> container for etchant. An air pump with aquarium hose makes a good
> bubbler.
>
> You can use an aquarium heater, but you want the one that has a knob
> on top that does not have stops. You need to be able to turn this up
> to broil setting for fish, mostly because the normal ones are limited
> to 80 degrees F.
>
> Harvey
> ._,___