The simplest way is through water changes. Regularly changing a significantly large proportion of the water in a marine aquarium can reduce the concentration of nitrate through dilution, keeping nitrate at acceptable levels. The required amount of water to be changed, and the frequency of the changes, will depend on the how much nitrate is being produced, and how much needs to be removed. A lightly stocked, lightly fed tank will naturally have lower nitrate levels than a highly stocked and/or overfed tank.

Another way to remove nitrate from an aquarium is to grow algae (commonly macro algae) which use nitrate (and phosphate, though that is unrelated to the Nitrogen Cycle) to grow. These algae can then be "harvested", removing the nitrate they have used to grow from the aquarium. This is normally done in a macro algae refugium or an algae turf scrubber (ATS).

Another way nitrate can be removed is by converting it to nitrogen (a harmless, inert gas) which simply exits the aquarium as part of normal gas exchange at the water's surface. This can be done with the use of a deep sand bed, or DSB, which is a bed of sand at least 10cm (4") deep, in which the water is poorly oxygenated enough due to low water flow that anaerobic sections (areas without any oxygen present) can form. There are bacteria which live in anaerobic conditions which can convert nitrate into nitrogen. A variation on this method involves the use of a plenum, or small space of still water, underneath the sand bed - again, this water becomes so poorly oxygenated due to bad flow that it becomes anaerobic, allowing the bacteria which convert nitrate to nitrogen to grow.

Sulphur/Nitrate Filter

Result pages: 1 2   See details AQUA-EXCEL N1 Model: N1 Spec:26cm*16.5cm*46cm(L*W*H), Reaction pipe diameter:120mm Match import biology ball and 6 anaerobe food ball Power supply: 220V/50Hz 10w See details AQUA-EXCEL N2 Model: N2 Spec:26.5cm*17.5cm*56cm(L*W*H), Reaction pipe diameter:150mm Match import biology ball and 8 anaerobe food ball Power supply: 220V/50Hz 35w See details AQUA-EXCEL N3 Model: N3 Spec:32cm*17.5cm*68cm(L*W*H), Reaction pipe diameter:200mm Match import biology ball and 20 anaerobe food ball Power supply: 220V/50Hz 35w See details AQUA-EXCEL N4 Model: N4 Spec: 35cm*21.5cm*100cm(L*W*H) Reaction pipe diameter:200mm Match import biology ball and 40 anaerobe food ball Power supply: 220V/50Hz 50w See details NR-120-6510 Nitrate reactor Item No.:NR-120-6510 Size(diameter/height MM):120/565 Pump/power: HX-6510/10W Max. size of the tank (L):1200 Foot print(MM):200/195 See details NR-150-6520 Nitrate reactor Item No.:NR-150-6520 Size(diameter/height MM):150/665 Pump/power: HX-6520/35W Max. size of the tank (L):2200 Foot print(MM):240/215 See details NR-200-6530 Nitrate reactor Item No.:NR-200-6530 Size(diameter/height MM):200/740 Pump/power: HX-6530/50W Max. size of the tank (L):4000 Foot print(MM):290/260 See details NR-250-6540 Nitrate reactor Item No.:NR-250-6540 Size(diameter/height MM):200/820 Pump/power: HX-6540/100W Max. size of the tank (L):6000 Foot print(MM):320/310 See details SAILFISH NO1240 180X240mm See details SAILFISH NO2065 250X330mm

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