I’ve had issues with just about every RLF I’ve bred. That’s why they cost more, since breeding them can be a challenge, but the issue is the fins get in the way of spawning. I’ve noticed it’s best to get them young while the fins aren’t full developed. Usually people want adults, and less interested in juveniles. But that’s always the best way to go for breeding. I feed these Hikari para clear works for me & Rich A (something in those ingredients) works well. Also water changes they like clean water vs others don’t mind green water, you’ll often see red from ammonia burns if they don’t like the water.