Many have kept heavily planted tanks with goldies. What type of goldfish out of curiosity? Ive just put some goldies in a temporary tank a few months ago along with a crapload of excess plants from my plant tank and it looks like the only plants they have even touched are duckweed and floating baby tears, which they can eat all those they want. My goldies are a couple commons and a couple shubunkins. And those are suppose to be more active plant eaters than the fancier ones.