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Aids and procedures in the maintenance of hygienic conditions
Decorative material in the tank and its treatment
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accumulation activated char activated charcoal activated charcoal filtration addition aeration air-lift algae ammonia anabantids anaerobic aquaria aquarist Aquarium Hygiene aquarium tank aquarium water aquatic plants areas bacteria basalt chips biological bottom breakdown breeding tank calcium carbon dioxide characins cichlids circulation clean cloudiness contains coral-fish Cryptocoryne Cryptocoryne affinis decom decomposable detritus discus fish disease germs dried food external filter feeding filter medium filter substrate filtration fish and plants floating plants fresh freshwater fishes grams healthy humic acids humus important layers light live food loam marine fishes marine tanks micro-organisms mineral salts natural water nitrate nitrogenous Nowadays nylon wool oligotrophic organic matter oxygen ozone peat phosphate phosphorus plant growth plant nutrient poisonous potassium produced pump purification plant purification substrate remove nitrate roots sea-water tanks small amounts spawning species submerged substrate substrate filtration sufficient surface tank water tannic toothcarps trace elements Tubifex usually washed water hardness water plants