I need aquarium filter for my 300l tank. Would you help me with the choice?

Did you prime it? fill the filter with water, then plug it in. It should start pumping in a few seconds.

1st priory is to save the fish !! move them to a new container consisting of half old water and half new water (declorinated) along with a small air bubbler !! this should help your fish to recover (don't use soap to clean out container it is toxic to fish) moist table salt is best to use for a cleaning agent and rinse well b4 putting fish inside

then ck to see if your aquarium is pumping water thru the filter and falling back into tank ( replace all the water in the tank 1st with two rinses ) make needed repairs to pump and or filter assembly (New filter cartridge) new pump impellers and cartridges are available for purchase for your aquarium from vendors that sell aquariums and allways ck the outlet the pump is plugging in b4 blaming a pump fail with a known good table light set to "On" they do go off once and an a while
verify that water chemistry is ok b4 retuning fish to tank and observe fish for strange behavior for next several hours ( upside down swimming, laying sideways )

i have the same tank i take of the plastic cover that holds the filter take the 3 sponges and get the water from the tank and wash it in that and through that water away thats what i do but i dont use it anymore i used it for breeding my whitecloud mountain minnow

Dump water in top after plugging in

This can happen and will generally clear with time, if you are concerned do a water change. I find that this treatment is more hassle than its worth, if you have a suitable filter seachem denitrate is a good alternative, or he aquarium pure balls.

You need to take a few criteria into consideration before buying a filter for your aquarium. Afterwards, it will be easy to decide on a type of filtration system. Begin by considering your tank size and the type of fish you plan on inhabiting the tank. Some fish are dirtier than others and may need a stronger filter. Next you should consider maintenance (some require more than others). With these tips you should be able to narrow down your search field and find the right filtration for your tank.

Yes. There are both internal and external filters. External filters are normally hung outside the aquarium or placed under it inside the aquarium stand. Some of these filtration systems include power filters and canister filters.

The general rule of thumb is that all of the water inside your tank should pass through the filter at least four times per hour. This equation should make it easier for you to calculate. Here is an example - a 30 gallon tank needs a flow rate of 120 gallons per hour.

In my opinion, power filters are the best. They are easy to maintain and are also quite economical. The most common style of power filter hangs on the back of your tank. A siphon will pull water from the tank, eliminating any bacteria and returning filtered water back into the aquarium.

A filter maintains a natural environment that for fish thatbalances the good and bad bacteria in the tank. Additionally, a filter can remove toxins, chemicals and other unwantedmaterials from the water. The filterworks by taking water in from the tank and returning it clean.A pump is just a pump. It pumps air into the tank and creates bubbles, and sometimes a current. It does not clean the tank or balance thebacteria and PH like a filter does.