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In the natural environment these nitrates are subsequently taken up by plants as fertilizer and this does indeed happen to some extent in an aquarium planted with real plants. An aquarium is, however, an imperfect microcosm of the natural world. Aquariums are usually much more densely stocked with fish than the natural environment.
Periodic removal of the algae that has grown inside of an algae scrubber removes nutrients (ammonia, nitrate, phosphate) from the aquarium water, thus providing the needed filtration. An algae scrubber is a water filtering device which uses light to grow algae ; in this process, undesirable chemicals are removed from the water. [ 1 ]
It is considered one of the more difficult species to remove, and the plants may uptake calcium from hard water which makes them unpalatable to algivores. [3] BBA may occur in both saltwater and freshwater aquaria. [16] Red spot algae may form a tenacious reddish-brown splotch or film on aquarium glass or plant leaves.
An aquarium near a window is likely to be overgrown with algae. A material known as a "phosphate sponge" is available at aquarium shops to leach the phosphate out of the aquarium and reduce the growth of algae. Also, plants such as java moss (not java fern) compete with algae for another necessary plant nutrient, nitrate, and reduce algae growth.
Fishless cycling also allows the aquarium to be partially stocked from the moment it is cycled, if the nitrogen cycle is completed with high concentration of pure ammonia added daily. This means that for large aquariums, where fish must be added in several batches, fishless cycling is faster than cycling with fish.
All RAS relies on biofiltration to convert ammonia (NH 4 + and NH 3) excreted by the fish into nitrate. [4] Ammonia is a waste product of fish metabolism and high concentrations (>.02 mg/L) are toxic to most finfish. [5] Nitrifying bacteria are chemoautotrophs that convert ammonia into nitrite then nitrate.
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