How often do you do a water change in a cold water tank?

Answer 1

Water changes can really vary from the size of your tank to the amount of fish you have in it.New tanks will need more water changes than well established tanks because they will have higher ammonia and nitrite levels which are more toxic than the toxins (nitrate) found in cycled tanks.In the first four-six weeks of having a newly set up tank do partial water changes whenever testing for nitrite and ammonia reveals high ammounts.Do a 10-25% water changes at a time and when your aquarium is over 6 weeks do water changes of about 25% percent every one-two weeks and when needed(that is when testing reveals high nitrate levels).

Answer 2

Goldfish are notoriously grubby and mucky fish to keep in an aquarium but provided they are in a well balanced, not overstocked aquarium, that is well lit and planted and is also properly filtered, a tank could easily go for several years without a major strip down and clean out.

Answer 3

Depends on the size of the tank, the bio load and what makes up the inhabitants. Small regular water changes are greatly recommended over large infrequent ones. Too much water removed at once will remove too much good bacteria and cause a reset in the tank cycle resulting in an ammonia spike which could kill the tank occupants. Well filtered tank should average around 25% of the water once a month. Week after water change change one filter pad. If a dual pad or filter system, wait an additional week and do the second.

Answer 4

i Suggest you change it every 2 weeks because it gets dirty and fish need clean water but only a 50% change.

Answer 5

depends on how many fish are in the tank...at lease once a month.

Answer 6

if it is a little tank every month if it is a big tank about every third month

Answer 7

It depends on your filters and capacity- but only when necessary. Since it shocks the fish you should clean it only when you have to.

Answer 8

the best environmental to clean the fish tank is atleast 1 time per bi- weekly(2 weeks) or once a month . if you dont care about money, then 1 time per week.