hi! in regards to corydoras schooling, will they school with ANY type of corydoras? for example, will an albino, a green, and one of the speckled ones, etc school together? or would it have to be ALL abinos, or all greens, etc. the reason i ask is that i'd like to have some at some point but i've noticed that our pet stores don't have much variety. i don't know if i'd be able to find enough of just one type to make a school. pet store selections are quite limited in my immediate area (within half an hour/45 minute drive radius to my house).