Install A Protein Skimmer
1) A protein skimmer is often deemed as a necessity in a marine aquarium and if you have the space for one I would highly recommend it.
The breakdown of organic substances in the aquarium leads to water pollution which is not good for the health of fish, plus it aids in unwanted algae growth. A physical property of organic compounds is that they stick between the junction of air and water, such as the surface film on air bubbles. This effect can be seen in the ocean by the production of sea foam. A protein skimmer uses this principle to great effect and collects the foam in a cup which can easily be emptied.
The waste collected in the collection cup is a brown smelly sludge. The better the protein skimmer the less watery the waste product will be.
A protein skimmer creates a mass of bubbles in a column of water contained in a cylinder with an overflow cup at the top. To maximise the collection of foam the aquarium water must be exposed to the water bubbles for as long as possible to give the best results..
Some protein skimmers are operated by airstone or connected to a venturi device that creates the bubbles. In both methods a collection cup will sit on top collecting the overflow of foam. This will need to be emptied periodically. When cleaning the protein skimmer always make sure you clean the internal surfaces of the column to remove the collection of fatty acids. This will ensure th protein skimmer keeps working to its full ability. This does not need to be done every time you empty the overflow cup but it is a good idea to clean the internal column on a weekly basis.
When the protein skimmer is added to the tank and before the introduction of any fish you will find there is little organic matter to dispose of. The protein skimmer can be added directly to the aquarium or into the sump. They come in many shapes and sizes and if you want to add one directly to the aquarium they do make small compact ones ( This will help to not distract from the overall appearance of the tank). I
Protein skimmers are so effective that they are used in the 'Berlin Style' set up along with live rock to act as a filter. No other canister filters etc are used.