I have a pair of discus that lay eggs and will guard them. After about 2 days they eat them. I have removed them a couple of times but at about 30 hours 20 percent turn white the rest don’t turn white until about 5 hrs before they hatch which only about 6 will hatch. The eggs are very dark and you can see the eye but like I said they get so close to hatching then they turn white. Any information would be greatly appreciate. The temp is 83 and the tds is 150.