SunSun HJ-311B Aquarium Internal Aquarium Pump for 40l Fish 300l/h 2W

The SunSun HJ-311B internal aquarium filter combines the aquarium filter and the aquarium pump.The pump capacity of the aquarium pump is 300 ℓ/h with a power consumption of just 2 W. The aquarium pump, whose flow can be regulated by a slider, disposes of a rotatable discharge tube with a diffuser.At the same time, oxygen can be additionally added to the aquarium by a tube.The internal aquarium filter can be used for aquariums with a water volume of up to 40 ℓ without any problems. The operation of small aquariums becomes an easy task.On delivery, the filter unit of the internal aquarium filter is filled by default with activated carbon. A filter sponge serves as a second filter stage.Of course, the filter unit of the internal aquarium filter can be filled individually, however, you should keep in mind that the filter materials should be graduated from coarse to fine.Filter media:1ˢᵗ stage: mechanical/conditionally biological filtration 2ᵈ stage: chemical filtration (activated carbon, peat, phosphate ex, etc.)Filter floss – filter fleece/filter sponge:Filter media like fleece, floss or sponges are an important part of modern aquaristics.Due to filter floss, coarse dirt particles are absorbed, the sponges reduce the content of nitrate, they clean the water of chemical impurities, and ensure for optimal conditions for the accumulation of filter bacteria.Activated carbon:In aquaristics, activated carbon is used to bind urinary and humic substances, pesticides, and metabolic products as well as similar residues and by this means provide for clear water in the aquarium. Moreover, by using activated carbon, the content of ozone and chlorine in the water is reduced. Activated carbon is particularly well-suited for the pre-treatment of tap water to counteract turbidity due to floating particles and last not least to filter out any residues after a medication treatment.During a medication or algae treatment, you should renounce the use of carbon in the filter, however, after the treatment, it is indispensable to use it in order to remove any remaining residues. We recommend not to leave the activated carbon for a longer period inside the filter because, after reaching the capacity, bound pollutants might be washed out and return to the water.When purchasing an aquarium filter or after a complete purification, once again the beneficial bacteria have to be enriched. There are special bacteria cultures that can be added to the aquarium filter, thus facilitating the re-start.