Question about water changes

[CeeTee]

Should the SG of the replacement water match that of the tank water or should it be different?

[Mnesarchus]

For waterchanges, it should be exactly the same.

 

For top-off, it should be just water, no salt.

[skeletor]

Hey CeeTee,

 

It kinda depends on what your target SG is, and how far off that your tank is.

 

You don't want to change it by a large amount in a short period of time, so slowly bring the tank to your target and match your WC water to that.

 

I usually check the tank just before doing a WC and tweak the new water to match what I need to get to the target. I mix my new water just above my target..

 

YMMV..

 

skeletor.