Do the membrane thing below the gill covers grow back?

[Markjoel]

Have you tested your water?

No

If I did not test my water...

1. ...I recognize that I will likely be asked to do a test, and that water tests are critical for solving freshwater health problems.

Do you do water changes?

Yes

If I do not change my water...

1. ...I recognize that I will likely be recommended to do a water change, and water changes are critical for preventing future freshwater health problems.

My flowerhorn fry was injured by another flowerhorn and the membrane thing below his gills was torn

 

[Markjoel]

This is him
He is a kamfa f2 about 1.5 inches

 

[Markjoel]

As you can see his right gill is open because the membrane thing was torn apart