Hello and welcome Fruity fish,
The fish are very pretty. Do you know if you have males and females? Sometimes the group of fish, made up mostly of males will chase around and spar for the attention of females, or if there are not any females just bug each other and can cause extra stress.
How long has this tank been set up?
Do you know your water parameters?
/ general hardness
/ Alkalinity / calcium
- total dissolved solids
How long have you had these fish?
Are you familiar with the nitrification cycle? The article link in my signature has a lot of good information plus info on building a BB / beneficial bacteria colony in your filter and tank so you can keep the parameters safe and fish happier.
New to FW fish? First tank in a long time or EVER??? Need some info on keeping fish?
Start here - Aquarium Advice Article
FW Favorites right now Clown Loaches, any shrimp - SW Vase Red Mangroves