1. Reason: Arowana's eye drop on one side may be caused by uneven illumination. If the breeder only installs aquarium lamps on one side of the fish tank, they will receive uneven light, resulting in eye drop on one side.

2. Solution: Breeders need to install aquarium lights around the fish tank. If they are worried about too strong light, they can choose several nightlights with lower power.

1. Reason: Eye loss on one side of arowana may also be caused by overnutrition. If high-fat food is fed all the time during breeding, fat will accumulate around their eyes, resulting in eye loss.

2, Solution: Breeders need to increase their activity, which can eliminate their excess fat. In the later feeding process, it is best to mix meat and vegetables to avoid over-nutrition.

1. Reason: Long-term strabismus may also cause the dropping of eyes on one side of arowana. If the breeder feeds food on the same side for a long time, it will cause them to strabismus.

2. Solution: Breeders should choose some floating feed, which can correct the strabismus of arowana and avoid eye loss.

1. Reason: Arowana's eye drop on one side may also be bacterial infection, and their eyes are fragile. If the eyes are infected, the eyes will droop, which looks like eye drop.

2. Solution: Breeders need to change water first to ensure clean water quality. Then use yellow powder or potassium permanganate solution to give sick fish a medicinal bath, which can be recovered after about one week of medicinal bath.