HI GEORGE
THE PROBLEM YOU'VE GOT IS HALF THE FISH YOU HAVE ARE NATURALLY VEGETARIAN, ESPECIALLY THE SILVER DOLLARS. BUT I USE THE FOLLOWING PLANTS IN MY HEADSTANDER TANK, AND THEY SEEM TO GROW FINE.
HYGROPHILIA POLYSPERMA
BACOPA AMPLEXAS
VALLISNERIA GIGANTEA
CRYNIUM BULBS, (ONION PLANTS)
JAVA FERN
ANUBIAS NANNA
HOPE THIS HELPS MATE.