Hi Guys - although I am new here - I am a bit of an old hand at aquarium keeping. Had a marine with sump filtration, skimmer, bio-balls, halide lamps, UV etc. etc. And this was succesful and I learnt a lot. Since then I got married - had kids and other priorities. Now - the kids have grown up - and I am able to look after some of my hobbies. Decided to start with a Lido 120 - as an intro for my kids. Bought it in Dec 2010 - and - as of today I added a FLUVAL 205 Cannister filter..
WHY? - Because I found that the water quality - was not clear. There was a cloudy tinge - that I was not able to get rid of. All the water tests - weekly - proved to be normal - however - I was not convinced that the existing internal filter/pump - was sufficient. Maybe I have it over-stocked - and therefore it is not able to keep up - But - I am not happy with the water clarity.
So decided to add an external filter - FLUVAL 205 - to the aquarium. So I have two filtration systems running at the same time - will wait for about 2-3 weeks - and allow the FLUVAL to start its bacteria growth etc. I will post my findings as I go along. It has been a few hours now - and already the tank - looks better, I reckon 15% better.
There is more water movement - and the fish love it. And according to the information on the FLUVAL - 600 litres per hour - that means - the tank is being cleaned 5 x per hour... Must see what it will look like a few days from now...
In the long-term - may decide to remove the internal filter altogether - but I will wait for the FLUVAL to catch up - before considering.
Anyone - with similar experiences - let me know - hear etc.

WHY? - Because I found that the water quality - was not clear. There was a cloudy tinge - that I was not able to get rid of. All the water tests - weekly - proved to be normal - however - I was not convinced that the existing internal filter/pump - was sufficient. Maybe I have it over-stocked - and therefore it is not able to keep up - But - I am not happy with the water clarity.
So decided to add an external filter - FLUVAL 205 - to the aquarium. So I have two filtration systems running at the same time - will wait for about 2-3 weeks - and allow the FLUVAL to start its bacteria growth etc. I will post my findings as I go along. It has been a few hours now - and already the tank - looks better, I reckon 15% better.
There is more water movement - and the fish love it. And according to the information on the FLUVAL - 600 litres per hour - that means - the tank is being cleaned 5 x per hour... Must see what it will look like a few days from now...
In the long-term - may decide to remove the internal filter altogether - but I will wait for the FLUVAL to catch up - before considering.
Anyone - with similar experiences - let me know - hear etc.