How much water to remove from tank?

[homersimpsonlikesfish]

Is there an online calculator that tells how much water to remove per gallon in a saltwater tank per each week/month during a water change?

 

[Icryhard]

No, but you don’t need to either. If you really want something to “calculate”, just take 30% of your total volume.

 

[exnisstech]

Total water volume x 0.10 for 10% WC x0.20 for 20% and so on. This is probably the first time I've ever been able to offer advise on math

 

[homersimpsonlikesfish]

Total water volume x 0.10 for 10% WC x0.20 for 20% and so on. This is probably the first time I've ever been able to offer advise on math

So if my tank is 40 gallons I only need to remove and replace 4 gallons each week?

 

[exnisstech]

So if my tank is 40 gallons I only need to remove and replace 4 gallons each week?

That is correct if 10% weekly is your plan.