Relationship between Bioload, water volume and water changes?

[Levinson]

Assuming the bioloads are the same, how does water change work for different sized tanks? I mean water change, not as a means to export nutrients but to replenish elements.
Does a bigger tank need more water change volume-wise? or the same?

Just an example:
10% weekly for 30gallon tank
VS
5% OR 10% weekly for 60gallon tank with the same bio-load.

I'm planning for a new tank and thought if I should get a sump much bigger than it needs to be, just because I have the space. They say bigger sump/more water is always better with the added stability and all but it would suck if I had to to the same 10% weekly for both big and small setup with the same bioload, not to mention the higher running cost involved with heating and chilling more water.

 

[blaxsun]

On larger tanks less frequent water changes (such as 10% every 2 weeks) are fairly common, and many owners have mixing stations, water storage and auto water change systems.

 

[Azedenkae]

Assuming the bioloads are the same, how does water change work for different sized tanks? I mean water change, not as a means to export nutrients but to replenish elements.
Does a bigger tank need more water change volume-wise? or the same?

Just an example:
10% weekly for 30gallon tank
VS
5% OR 10% weekly for 60gallon tank with the same bio-load.

I'm planning for a new tank and thought if I should get a sump much bigger than it needs to be, just because I have the space. They say bigger sump/more water is always better with the added stability and all but it would suck if I had to to the same 10% weekly for both big and small setup with the same bioload, not to mention the higher running cost involved with heating and chilling more water.

You are right, would be a smaller % water change if it is the same bioload in a larger tank.

 

[Levinson]

On larger tanks less frequent water changes (such as 10% every 2 weeks) are fairly common, and many owners have mixing stations, water storage and auto water change systems.

You are right, would be a smaller % water change if it is the same bioload in a larger tank.

Thanks!