When I checked this morning to see if the eggs hatched (they did), I noticed some white spots on my steel blue delta male betta. I also noticed that there are a lot of fry in their yolks on the floor of the tank and that the bubble nest is only half the size of what it was last night. So he's got ich... I can't very well remove him since he's tending to the young (sort of). I can't do a massive water change. How can I safely treat for ich in this tank now that I've got betta fry ready to swim around? Please help! I want to save him and not kill the fry. What do I do?