What filter should I get?

Under Gravel Filters

 
Ah yes. The boomer of filters. Honestly, I'm suprised they still make them and they are still used. They aren't too eficint at filtering and they can suck up substrate. To do any matenince to the filter it's self, you have to take out everything since all of the decor and substrate are on top of it. They take wierd media which ( to my nolage) don't really fit well.