hi, ive just set up a filterless goldfish bowl so i can keep 2 small amano shrimp in it, i could never get a close up view of the shrimp in my 200 gal tank, it has a small amount of sand in, with some bogwood covered in java moss and java fern, it is lit by a 20w halogen lamp, the questions i have are, what do i feed them, (the wood came from my mature tank, so theres some algae on it) do i use algae tabs, or should i feed fish food, ive never really thought about it in my big tank, as they can do what they want in there. will the light be sufficient to keep the plants going? and how often should i do water changes? any advice would be good. if i cant keep them long term they will have to go back into the main tank.