Yes you should take them out Betta do not get along and most fish eat their young so this is a definitely good choice! If you leave them in there they'll all get eaten. I left my fry in the community tank and all of them got eaten do yeah it'd be best for the fry.
Once the fry hatch you must remove the dad. He ate some already in he will do it again if you leave him in there longer you won't have fry.
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