I hope your strips are wrong. They usually are. No fish will survive 10 ppm nitrites.
Keep doing 50% WC with dechlorinated water matched for temperature and stop feedings for few days. Bloodworms are polluting the water more than flakes or pellets. Once a week bloodworms is more than enough. Once a day flakes is OK for adults fish, and only what they can eat in 1-2 minutes.
Keep doing 50% WC with dechlorinated water matched for temperature and stop feedings for few days. Bloodworms are polluting the water more than flakes or pellets. Once a week bloodworms is more than enough. Once a day flakes is OK for adults fish, and only what they can eat in 1-2 minutes.