Sounds good to me, Gill. As long as you work with a low fish load, a veggie
filter will be fine. If the next section of pond is going to be bigger and
deeper you might want to consider a bottom drain & skimmer at the time.
Maintenance wise they make life simpler.

What is your plan regarding keeping the fish from eating the frog eggs? I
always pulled my goldfish out in the spring and put them back when the
tadpoles were big enough not to be eaten. ~ jan
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Zone 7a, SE Washington State
Ponds: www.jjspond.us