How much water change do you need for goldfish?

[aquamist666]

How much water change do you need for adult sized goldfish in a 60 gallon tank? And how often do you need to change the water?

 

[Fishfur]

The goldfish keepers I know do at least two 50% changes a week and one of them does 3 changes that size.

 

[aquamist666]

The goldfish keepers I know do at least two 50% changes a week and one of them does 3 changes that size.

I will just stick with smaller fish then if I want to do a water change every two weeks instead.

The goldfish keepers I know do at least two 50% changes a week and one of them does 3 changes that size.

But I do have another question:

Pet stores like PetSmart cram 100 feeder goldfish in a small tank and how often do they do water changes on that?

 

[Fishfur]

I will just stick with smaller fish then if I want to do a water change every two weeks instead.


But I do have another question:

Pet stores like PetSmart cram 100 feeder goldfish in a small tank and how often do they do water changes on that?

For a start, because they are cheap feeders, stores do not waste space or care on them beyond the bare minimum to keep them alive,

There is an enormous difference between mere survival & thriving.

Furthermore, those fish are not living there for life - they are there only as long as it takes to sell them. There is a big difference e between short term crowding & crowding for life.

Most stores have a plumbing system that connects all or most of the tanks so they can run fresh water that way. Siphoning is only done to clean out waste so display tanks look nice.

In stores that take good care of the fish they do get regular water changes and well fed and medicated if it’s needed.

You really can’t compare a tank of feeders in a store to a well run home aquarium - it’s like comparing apples to kiwi fruit.

 

[Sewerrat]

A common goldfish which is the one I'm assuming your asking about based on size will get too large for a 60 gallon. You could probably do a fancy with a 50% change every two weeks in a 60.