HELP! I am lost. What will the best filtration system be?

I am in the process of building a tank (to fill an odd corner in my room)
The dimensions will be 80cm (w) x 50cm (b) x 60cm (h) 240litres. I am planning to house a pair of Green terrors OR a pair of Hypsophrys cichlids.
What will the best possible filtration be for this tank?

1- To keep the water as clear and clean as possible
2- Will keep my bacteria happy
3- NB! Be as quiet as possible, as this is in my bedroom, and I am a light sleeper

I am not sure if internal filter (Like the Eheim Aquaball) of canisters will work best for my situation. Please any advise will be helpful

 

I use the Eheim Aquaball filters and they are dead quiet. The tanks are also in my bedroom so it is important to me that they are silent. I use 2 of the 2 tier ones in each 3ft tank but that is because the bioload is very heavy. I am not sure how many you would need for your tank.
I do know that canister filters are also very quiet / silent so you could go that route as well.

 

aquaclear filters are completely silent and vert good quality i have 2 of them

 

@Irma thanks what model do you use (2206 , 2208 , 2210 or 2212) Will these not create a very strong current in the tank taht might upset cichlids- though I think the green terrors might just like it
@Ryno - I don't know aquaclear- are these internal filters or canisters?

 

Eisch! I cannot remember. I bought them over 2 years ago. They have 2 compartments that you can put media or sponges in and then there is a 3rd small compartment with a sponge right at the top of the filter.
So, I have a sponge in the bottom comartment, Nitri-guard bio cubes from Ocra in the middle compartment and then the smalll sponge at the top.

The flow is not that strong and with a tank that size, it should be fine. I point the spout up at the surface to oxyginate the water as much as possible as I have no airstones at all.

 

Canisters are very good and also easy to maintain. Very quiet too.

 

I am using a Dophin C1300 canister filter and it works incredibly well for my 224lt Discus Tank, it is also silent and easy to maintain and doesnt take up room in the tank being an external canister

 

It hangs on the outside of the tank.

 

my fluval 104 is very quiet, especially when inside a cabinet. the tank used to be in my bedroom too.
the internal filter in my nano is louder!

 

@Anine @Irma @Ryno @Aqua @trever1971 - Thank you all very much. Always nice to get ideas
I looked at all the suggestions and did some research, and I think I might just go for the Eheim Classic Canister 2215. The reviews on this product is very good as well

 

Fluval range of external canisters.

Eheim even better.

Wouldn't waste time with internals on that size tank.

 

Thanks @Reedfish and @Zoom
Eheim External canister it will be then

 

I used two eheim canister filters, for the big tank and one for the small tank, they are very nice cannisters and very soft. I have now also bought the small internal eheim filter for my guppies, still need to hook this one up. You cannot go wrong with the Eheim