For my microaquarium I used plants A and B and I used water from tank 7. For my first observation I saw a lot of mosquito larvae and/or nematodes. They both have long bodies that move in an s shaped curve. They were scattered across all parts of the microaquarium. I also saw a few insect that fit in the anthropod phylum as they had small circular bodies and move in a spinning motions. They did have "legs" but I could not see how many. I assume that these are nymph water bugs as they have no wings.