How sensitive are fish to alk swings?

[forestsofkelp]

I have a question born of laziness.

I am receiving a new fish. I am recommended to let it acclimate in water of Sg 1.023, which I have stored from my prior acclimation.
The method is to temp acclimate, then move to water of 1.023 for 15 min, the put in the tank. It has been successful for me so far.

However the water I have stored has a kH is 8, while my tank is 9.0-9.5. Will moving the fish from 8 to 9.5ish cause harm to the fish?
I feel like it would, but I also never check kH on the shipped water, and even if I mix up new water or dilute it from tank, the the kH would probably drop. And its only exposed to the kh difference for 15min or so

Any ideas on this? Am I overthinking it?

 

[blecki]

I don't understand why you have 'stored acclimation water'? Why wouldn't you mix up new water at the SG the fish was shipped in, move it immediately to that, and then acclimate slowly to the tanks SG?

 

[Mr. Mojo Rising]

I think you are overthinking, the alk will not bother the fish.

I also never heard of storing acclimation water... Is your tank at 1.023, why acclimate to 1.023? Why not acclimate to your actual tank water?

 

[forestsofkelp]

The acclimation protocol from the shipper is to use/start with lower SG, since that’s what the fish is shipped in.

I have stored it because I had 5g I used for a recent fish shipment, but I saved it to rinse media with. I just realized I could reuse it. I won’t store it long term, it’s just been a week or two. One fish didn’t get shipped, so I’m getting a replacement.

 

[exnisstech]

I would follow the vendors recommendation. I wouldn't worry about the difference in alk as I'm pretty certain it won't bother the fish. I move inverts back and forth between tanks of varying alk with no issues and they are more sensitive than fish.