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It is recommended to change about 25-50 of the water in a fish tank every 1-2 weeks to maintain good water quality for the fish.

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6mo ago

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How much water should be changed in an aquarium?

Approximately 25-50 of the water in an aquarium should be changed every 2-4 weeks to maintain a healthy environment for the fish.


Why is your fish lethargic after a water change?

It depends: Maybe you haven't changed the water in a while and your fish isn't use to th new clean environment, maybe you changed too much water, or the fish is uncomfortable.


Should you get a new filter for your fish tank or will they be ok if you just change the water regularly?

no, The carbon in your filter can only take in so much. it must be changed when the water flow is restricted. only do 10% water changes at a time .


How much should fish eat?

Different fish, different appetites. Just like people. They should be fed morning and evening as much as they can eat in 15 minutes. Any left over food should be removed and not left to rot as this will poison the water which will kill the fish. The basic rules for keeping any species of fish successfully are :- 1 inch of fish needs a minimum of 1 gallon of water. :- Every tank needs a permanently running cycled filter. :- Every tank need at least 50% of its water changed every week. Follow and keep to the above rules and your fish stand a chance of survival. Fail to keep them and I can guarantee that your fish will be constantly getting ill and maybe dying.


Which factor should be changed if you want to test how much water bean plants need for good growth?

Amount Of Water


Why the goldfish stays still and on the ground?

The water needs to be changed ASAP. Fish behave like you describe when the water contains too much ammonia and is burning their gills. (It's like us having mustard gas in our air supply). If the water is not changed soon the fishes gills will be permanently damaged and it will probably die. The rules for keeping fish are :- 1 inch of fish needs a minimum of 1 gallon of water, a cycled filter running permanently and the tank needs to have at least 50% of its water changed every week.


Do coldwater fish need a pump in a small tank?

Yes it is inhumane to keep any fish in a tank without a filter if you do not want to put the effort into changing the water frequently. Fish can be kept without if the water is changed regularly, but maintaining the correct water parpmeters is hard. As they will die if the water is not changed regularly a filter must be used if you don't want to put as much time and effort in. IT IS EASIER TO KEEP FISH IN A TANK WITH A FILTER THAN ONE WITHOUT


How much water does the fish needs?

It depends on the fish.


How do you a tank?

when you clean a fish tank you should only do a 5 or 10% water change. You should wipe any algae off the glass, filter of objects in the tank using a new cloth as any soaps that get in the water will kill the fish. After this the water may be cloudy but the filter should clear this within a few hours. You should never do a 100% water change as this much change will overwhelm the fish and could kill them.


How much conditioner should be put in a tank for a betta fish?

It depends on the type/brand of conditioner, and how much water is the Betta tank can hold.


A student wants to perform an experiment to test how much water bean plants need for good growth Which factor should be changed?

The amount of water.


Can Siamese fighting fish live in brackish water?

No, they are freshwater fish. They can tolerate up to 2 grams of salt per litre of water (2 teaspoons/gallon) but this should only be used for medicinal purposes. They should not be exposed to this much salt long term.