When Shoud I Do A Water Change

when should I do a water change my?my 20 gallon tank has 2 honey gourami and 8 neon tetras its been running fine for 4 days so when and how mush should I change.

 

Depends on the water parameters. If there’s any ammonia or nitrites I’d recommend a water change ASAP but if the tank is fully cycled you could probably just do one every week or every two weeks. A standard water change is between 25-50% of the water.

 

I agree with Lilbub, really depends on your parameters. If it’s not cycled you’ll need to do waterchanges as needed, but if it is generally it’s every week. Although if your parameters are usually really good you might be able to stretch it to two.

 

Are you familiar with the nitrogen cycle because that will make a difference in how often you change water.

If you're not familiar with it, click on the blue word

 

Don't know why the word cycle lost the link

 

Are you familiar with the nitrogen cycle because that will make a difference in how often you change water.

If you're not familiar with it, click on the blue word

sorry I should have said that it was cycled so yes I am familiar with the nitrogen.

 

Awesome! I do 30-50% a week, that's usually what's recommended.

 

NightShade can you give me a little help real quick?

 

What do you need? Do you have a separate thread I can help on?

 

Can you do me a favor and check my thread real quick? I have a few pictures on there I need help with.