Hi. I am working on a established 10 gallon tank (24"x9"x12") with 4 iridescent shark/catfish (4", 5", 9", 9" approx) and 2 common pleco (5" approx). As the tank is too small for the big fishies am giving them to LFS. 1: I want to add Tetra (schooling fish). So which of the tetra species is recommended for the 10g tank. (No, will not be upgrading to larger tank.) 2: Which other fish should i add that will make tetras to school, but will not eat them. 3: have a filter that generates a moderate flow in the tank. Current Substrate= bigger gravels. Want to add an earthen small pot for hiding/resting/decor. Also the average temp in my region (mumbai, india) varies from 24~34° Celsius.