What you will require:
1) You will need a 5 gallon bucket that has never contained chemicals or soap.
2) A gravel cleaner or hose
3) A bag of synthetic or real sea salt
The tank must be cleaned weekly on the same day, although the filters may be cleaned every two or three weeks.
Before you begin cleaning your fish tank, you must first disconnect the heater, if present. Before trying to remove the water heater, ensure that it has been disconnected for at least 20 minutes. The heater cannot be removed from hot water. The water helps cool the glass on the heater; if removed, the glass might break or shatter completely. Remember to never put your hand inside a fish tank before the heater is not only turned off but also disconnected from the wall. A minor break in the heater might be sufficient to deliver a lethal electric shock.
After the heater has had time to cool, it is okay to remove it from the tank, or if it is submersible, you can simply push it to the bottom of the tank.
Now remove any decorations you may have put in the tank, leaving just the little pebbles at the bottom. This will enable you to remove any dirt that may have been concealed by the decorations. Now, without a gravel cleaner, you will need to roll up your sleeves and get your hands dirty. You must mix the gravel to get the dirt that has accumulated between the pebbles into the water, and then begin draining the water into a bucket with a hose. Do not discard the water, since it will be required to clean the filters.
If you have a gravel cleaner, push the plastic tube into the gravel until it reaches the bottom of the tank, then start a siphon into the bucket. Every second or two, move the gravel cleaner over an inch or two and repeat until 15 percent of the tank's water has been removed or the gravel has been cleaned.
At this stage, it is time to clean the aquarium's filters. The inside of the filters are used to cultivate bacteria that aid in the decomposition of nitrites and nitrates in the water caused by fish waste and uneaten food. To avoid killing all of the beneficial bacteria in the aquarium, we clean the filter materials and sponges in unclean water that is also full with bacteria. Removing everything from the filters, rinsing them in the bucket of filthy aquarium water, giving the sponge a few squeezes in the bucket, reassembling the filters, and reinstalling them on the tank are the steps required to clean the filters.
Now, before adding water, it is necessary to add sea salt to the tank. To imitate the natural environment of your fish, you must include salt in your aquarium's water. Add around 1 cup of sea salt per 50 gallons of water.
Now you may add water to the tank, but it must be within two degrees of the temperature of the water already in the tank. A abrupt shift in the tank's temperature might cause the fish to go into shock and die, or it can impair their immune and cause them to get a disease. I propose filling the bucket with hot water and monitoring it until it reaches the same temperature as the tank, then gently adding the water to the tank and turning on the filters and heater.
The filters need to be cleaned once or twice every month, however the water in the tank must be cleaned every week on the same day.