Brown Algae Diatoms

Adding the fish to a tank will start the cycle. Here, read this......

The Nitrogen Cycle
When fish and other marine animals consume food, they produce waste that contains ammonia. This ammonia is highly toxic. In nature, there are bacteria that break down the ammonia into less toxic substances. One type of bacteria converts the ammonia into nitrites, which are also toxic. Another type of bacteria converts the nitrites into nitrates. Nitrates can also be harmful in high concentrations. Fortunately, there is a type of anaerobic bacteria that grows deep inside the live rock, which convert nitrates into harmless nitrogen. This will not typically be sufficient to eliminate all nitrates, but it helps. The remaining nitrates can be kept under control by regularly changing the water. (If you are using a DSB, virtually all nitrates should be eliminated by the anaerobic bacteria.)
What Does it Mean to "Cycle" a Tank?
When you first start your aquarium, it will be missing the bacteria that remove ammonia and nitrites. Therefore, if you were to immediately fill it up with fish, the waste they produced would quickly fill the water with ammonia and kill them. (The seemingly mysterious deaths of fish in new tanks is commonly referred to as "New Tank Syndrome".) In order to avoid this, the tank must be "cycled" before you stock it. Cycling simply means waiting for the bacteria to populate the tank.
How Do I Cycle My Tank and How Do I Know When it's Done?
The bacteria you want feed on ammonia, so in order to start the cycling process, you need to supply a source of ammonia. The bacteria are actually all around us, so you don't need to do anything to add them. Wherever there is a source of food for them, they will show up in droves. There are a number of ways to supply this ammonia. For a long time, people would do this by putting a few cheap, hardy fish in the tank and letting them produce waste. However, this is becoming less common--mainly because it's somewhat cruel. You can also cycle the tank by just putting some fish food in the water. It will decompose, producing ammonia and starting the cycle. The method I prefer, however, is to cycle with live rock. This allows you to cycle your tank and cure your live rock at the same time.
You don't want to put in all of your live rock right at the start. This can produce too much ammonia, resulting in the destruction of all the valuable microfauna on your rocks. Start by purchasing about 1/4 of the total amount of live rock you will want in your tank. Fill up your tank with saltwater with a specific gravity of about 1.022 - 1.024. Also fill your sump about 1/3 of the way up. Add your buffer and calcium in accordance with the instructions on the bottles. Set up your overflow and filter, then turn on your protein skimmer and heater. Turn on your sump return pump and make sure that water is flowing through the overflow box into the sump, and that the water level in the sump isn't continually falling. Now add your live rock. From this point on, you should check your ammonia, nitrite and nitrate levels daily.
The amount of time required for a tank to cycle can range from a few days to about a month. Throughout this process, you should examine your rocks daily. Any black or white film forming on the rock should be removed. You can approximate how far you are in the process based on the results of your daily water tests. The live rock will produce ammonia and you will see your ammonia levels rising. The first type of bacteria will begin to colonize your tank, turning the ammonia into nitrites. You will begin to see a decrease in ammonia accompanied by an increase in nitrites. This will in turn cause an increase in the population of bacteria that feed on nitrites. As these proliferate, nitrates will be converted into nitrates. Once you begin to see nitrates being produced, you are getting close to the end. Often times you will get a bloom of algae. It's annoying to clean up, but it's not a serious problem. Once ammonia and nitrites are at undetectable levels, your tank is fully cycled. Do a 50% water change, then check to make sure your nitrates are at a safe level (below 20 ppm). Now start adding the rest of your live rock 10 lbs. or so at a time. Monitor ammonia, nitrite and nitrate levels for a few days after each addition and wait until ammonia and nitrites have disappeared before adding another batch. Once you have all your live rock in the tank and are again ammonia and nitrite free, do a 30-40% water change. You are now ready to begin adding livestock.

 

well he didn't say about avoiding water change while the cycle is not finish. fish can be use to start the cycle but it will also prolonged the cycle. also fish needs light to get their optimum coloration but not necessary during cycle period.

 

I bring GOOD NEWS! i did what you guys told me about the lights and in a matter of 2 days my algae problem is gone baby gone!!,, and my cycle is going smooth my nitrite level is rising and my ammonia is falling! thanks for your help