Sounds like you are learning fast, Kathy.

Good move to get rid of the cmpost nutrients.

Many ponders get rid of the gravel as it collects muck. Plants then
end up rooted in pots of various sorts. Then the muck moves more
freely into the filter.

You did not say how large your pond is.

As you keep changing it, keep writng. People will have lots of
comments from their experience. Actually, you can search the archives
to find comments on most things.

Enjoy your pond!