You should take him out once the fry start to swim around! or else he might eat them! Then it is very hard work, because you are the one who will be taking care of those fry after you take the male out!
just keep it at room temperature. If you clean the tank, have your Betta stay in a different container of water and leave the tank full of water (sink water) and keep out for about 5 to 15 minutes....
You could put platies, tetras, corydoras, oto cats, guppies (non-fancy), danios (glofish), shrimp, snails, mollies, swordtails, barbs, rasboras, and African dwarf frogs. I would not recommend putting...