LOL.
Are the fish trying to jump out of the water Shady?
My mate let his tank water get so bad all his fish were trying to jump out of his tank.
I helped him do a 50% water change and then 2 days later, another 50% which helped to bring his water parameters back down to acceptable levels.
If the filter's not up to it, all sorts of bad things can happen to your water.
If thats the case, increase how often you do your water changes and change larger volumes too because this is the only way to keep your water reasonable when your filter isnt up to the job
Hope that helps you and the kids out