so far haven't had any fry die on me but I have been slacking on water changes doing a 15 percent change every 2 to 3 days for the growout tank with just fry and the bristlenose, as for the parent tank, weekly, with alot of algae growing on the fake plant in there for grazing and fed 3 times a day crushed fine crisp and flake food along with ground down freeze dried bloodstream and North fin bug pro for the parents