I am cycling my tank with a pregnant platy. I am waiting for that and for her to have the babies before adding any more fish. It is a 20 long. Today's test was ammonia .25, nitrites 0 and nitrates between 5-10. I know I want to add 6 dainty cories, 6 of another school either harlequin rasbora's, cherry Barb's or glofish danios and then 1 or 2 honey gourami. Plus some ghost shrimp. How many fish would you add at a time when the tank is newly cycled?