How often should I do a water change

[KillerKlownFish]

Question:
Is it better to use mixed saltwater $8 or buy the 4+ gallon of live water $16
???

 

[Dalmatia]

Mixing it your self is better, hopefully done right

 

[joshporksandwich]

I do 10-15% every 2 to 3 week and everything in my tank is happy.

 

[Dashiki]

Does anyone else put an air stone with their water that's curing? I do and often find lots of impurities that will float on the surface after about 24hrs of curing. I guess it's working like a big skimmer

Your most likely just precipitating the alk/cal in the salt mix.

If you are using rodi then there are no impurities.

 

[Dashiki]

I do 5% a week on my 60cube and almost never on my 300 fowlr

 

[Dalmatia]

Your most likely just precipitating the alk/cal in the salt mix.

If you are using rodi then there are no impurities.

So a skimmer would do the same? Am I wrong? every batch I cure has some impurities but sometimes has none, I don't see an air stone precipitating cal or your KH?