keep it on the desk. it probably won't do any better in the pond or lake. And it may become an invasive if there's a female friend around! A sincere suggestion: put some lucky bamboo in the vase and if you want to have a completely equilibrated system, put in another low level light plant (can't think of any sorry) that the fish can nibble at.
q: where's your next travel destination planning to be?
q: where's your next travel destination planning to be?