While building an aquarium, the size and usage are things to be considered. Normally an aquarium needs 60 cms length and 30 cm width and height. The volume of the tank depends on the number of fishes to be put in there. The aquarium has to be disinfected in potassium permanganate solution before using it. The tanks should not be kept where there is strong sunlight. Usually aquariums are kept near a window which receives sunlight for 1 or 2 hours daily or at the portico. Giving a roof to the aquarium adds to its beauty. The bottom of the aquarium can be laid with cleaned white sand. While filling the tank, use a cup or paper so as to avoid splashing of the sand. Colourful marbles and pebbles are also used in aquariums. A disadvantage of this is that the fishes may not find the food or the food has chances to get decayed and contaminate the water. Never use chlorinated water to fill aquariums, the most ideal being rain water. Water can be dechlorinated by keeping it open for a few days.
When we buy fishes from a nursery, it is packed in plastic covers. The fishes should not be transferred immediately since there may be variation in the temperatures of the aquarium and the covers. So keep the covers in water for at least half an hour before transferring the contents. Hands should be made clean before putting in the tank at any circumstances.
The fishes need to be fed just once in a day and that too in the optimum quantity. Excess food may decay in the tank contaminating it and cause damage to the fish. The excreta of the fishes should be removed with a siphon. The water in the aquarium should not be changed frequently. Dead fish should be taken out soon and the infected ones should be kept in a different place. To prevent infection it is desirable to add 2 drops of ‘Blue solution’ in the water. The ornamental fishes in the aquarium can be taken care of with these tips.