Breeding logs are normally used by experienced hobbyists so that
they can remember how they bred a certain species. It can also
help explain what they did wrong or what they did right.
They normally only cover rare or hard to breed species but I have
kept records of common Corydoras species.
They normally contain details of the tank setup and the conditions.
Throughout you may want to note details on spawning methods, egg count,
fry survival, male/female ratio etc.