HELP! Filter situation in need of a solution

[KaylaP]

Hello everyone, so back in December of 2014 I was gifted my first fish, a beautiful blue betta. Immediately I went out and purchased Petco's Arc 6.25g fish tank and fell in love with it's setup.

Unfortunately, it's time to change the filter catridge as they are no longer doing their job (as shown below they are terribly worn down) and to my dismay, after many calls and shopping around, I've found they've discontinued selling them along with the tank.

If anyone can PLEASE help me find an alternate solution to continue filtering his tank I would greatly appreciate it as I am new to the whole aquatics side of life.

Another thing, because of the way it's set up and the limited space, I cannot purchase another filter unless it's veryyy small as all the other ones I've seen are far too big for his tank especially because for the most part his tank is completely covered as he's a jumper.

Thank you!!

 

[KaylaP]

 

[tanker]

I would find this and cut to the size needed.
http://s7d5.scene7.com/is/image/wasserstrom/630664?wid=1000&hei=1000&v=2

 

[KaylaP]

I would find this and cut to the size needed.
http://s7d5.scene7.com/is/image/wasserstrom/630664?wid=1000&hei=1000&v=2

Thank you so much!! And as for the filter catridge with the small balls, what could I replace that with?

 

[tanker]

Looks like ammonia or Nitrate removers. You can do without them as long as you do weekly 15% or more water changes.

 

[KaylaP]

Looks like ammonia or Nitrate removers. You can do without them as long as you do weekly 15% or more water changes.

Great! Thank you so much for the help, really put my mind at peace haha.