New set-up

[Mama Mia]

I m starting all over with a new tank and I would like to know if a sponge filter and a corner filter will be enough for Aztec?
I have been reading that the sponge filter is best but what size should I get? the tank is a 20 gallon and as for the corner filter it is small,
I just need to know if these are good choices and what sizes I should get,
Thanks in advance of your answers.

 

[layna]

Usually when you purchase a filter it tells you how many litres per hour it does, you want one that does around 4X what your tank holds so a 100L tank needs a 400L/per hour filter.

I have a corner filter that does 4X my tanks water and a sponge filter in my tank, if your corner filter did slightly less than your tank volumes, then the sponge would make up for it