10 Gallon Tank Saltwater Water Changes

JtheFishMan

Member
Quick Question:

When doing a partial water change on a saltwater tank, do you replace the water with saltwater with the same salinity level, or freshwater? I know adding freshwater will lower the salinity level, but my salinity level in my 10 gallon is perfect where it is. But, I’m worried that adding saltwater, even with the same salinity, will raise the salinity in my main 10 gallon tank.
 

fish 321

Member
Refill with saltwater if you fill it with freshwater you will lower your salinity by alot.
 
  • Thread Starter

JtheFishMan

Member
fish 321 said:
Refill with saltwater if you fill it with freshwater you will lower your salinity by alot.
Ok, thanks a lot. I’ll do so.
 

Dechi

Member
I’m new to this but here’s what I plan to do : if the waterline is below my baseline, I will fill up to the mark with freshwater or RO/DI water and then I will make the water change with salt water. This way the salinity isn’t affected.

If there is no evaporated tank water, then just do a water change with salt water.
 

Jesterrace

Member
JtheFishMan said:
Quick Question:

When doing a partial water change on a saltwater tank, do you replace the water with saltwater with the same salinity level, or freshwater? I know adding freshwater will lower the salinity level, but my salinity level in my 10 gallon is perfect where it is. But, I’m worried that adding saltwater, even with the same salinity, will raise the salinity in my main 10 gallon tank.
The deal is that water evaporates but salt doesn't. So for top ups between water changes you add fresh RODI water to keep the salinity levels balanced. With a water change you are physically removing the salt along with the water, so you replace it with saltwater.
 
  • Thread Starter

JtheFishMan

Member
Jesterrace said:
The deal is that water evaporates but salt doesn't. So for top ups between water changes you add fresh RODI water to keep the salinity levels balanced. With a water change you are physically removing the salt along with the water, so you replace it with saltwater.
Actually just did my first water change on the saltwater tank a couple of days ago. Went well, salinity levels and other parameters stable.
 

Jesterrace

Member
JtheFishMan said:
Actually just did my first water change on the saltwater tank a couple of days ago. Went well, salinity levels and other parameters stable.
Yup, it's not too hard once you do it a few times. It's just a matter of getting your routine down and sticking to it.
 
  • Thread Starter

JtheFishMan

Member
Jesterrace said:
Yup, it's not too hard once you do it a few times. It's just a matter of getting your routine down and sticking to it.
Thanks for your help and support!
 

Random Great Thread

Latest threads

Top Bottom