Hi everyone, i recently saw one of those totally self sufficient ecosystem with those tiny shrimps in them. This really gave me an idea. I was wondering if i should try and make one using plants, and goldfish. i did some research, and I think that it is possible if I have a large container with a lot of plants. Of course, I will keep the top of the cojntainer open for gas exchange. I know that this may be cruel, so i even set up an emergency moving tank if the water quality does become too harsh for the fish. I have already started it up and I have added concentrated nitrifying bacteria into the water to give it a boost. I then added some straight ammonia to get things going. wqhen all of the water parameters were good, I added the most tiniest goldfish that I could find along with some water hyacinths. It has been about a week now, and i am getting confident in adding another fish. the goldfish seems fine and is moving about. Ofcourse, this isnt totally self sufficeint b cuz im going to change the water once in a while and I will add some food to compliment its diet of insect larvae and other "bugs" that likes to live in the water. I feed him only once every 2 days, so im pretty sure that the bioload will be fine. The water hyacinth's thick roots should suck up alot of the nitrogen waste and I am hoping that things will go smoothly. please add any suggestions if I am doing anything wrong. 
