Bottom Cleaners?

[bUcky]

im looking for something to help keep my oscar tank clean. i have corys in another tank but i really dont want to get more. pluss i need something bigger since my oscar could scoup up like 3 corys in one bite. i am also and getting rid of the 3 plecos in a pond im going to set up oustide. thanks for your suggestions.

 

[bUcky]

any one?

 

[Tech-Frog]

What do you mean by clean? as in remove mouldy looking water or remove debris from the bottom?