Yes my tank is very very well planted and decorated, there are caves and log caves and live plants and tall live plants.

As for being in with the goldfish. Just because there are goldfish in my tank does not mean it is full of ammonia. I check on the ammonia level frequently and it is always at 0. The tank is a 55 gallon so it has a giant filter for a 200 gallon. There is current flowing from the filter mainly in the middle. The corners and sides of the tank don't have that much current. The bettas love to hide in the leaves of the live plants and go in the caves too.