[APD] unglazed japanese pottery in tanks?

["william ruyle" <inquartata at comcast_net>]

After setting up another grow-out tank for my killies, I placed some potted
plants in it using terra cotta clay pots. I've done this a couple of times
over the years, but dislike the look of
terra cotta in the tank. Years ago I bought several unglazed japanese bonsai
pots in Japan that are a dark gray-brown
(dun?) color that would blend into the
surroundings much better. Four of them
are about 9 inches wide and 3 inches
deep. I'm wondering if there's anything
mixed with this dark clay that would
harm the inhabitants? I'm hoping this
will be a much more aesthetic alternative. Looking in the archives I agree
with Karen Randall that planting in the substrate is better, but sometimes
you need  tanks that can be easily broken down when not needed. Thanks for
any help given.

Bill



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