How fast can I drop my alk

[LxHowler]

So I made a post earlier asking about new salt and I have since bought the tropic Marin salt. I was looking for salt with lower dkh as I prefer to run lower and the salt I was using was inconsistent and mixed wildly different figures each time I used it.

So now I have picked my new salt I was wondering how long it should take for me to transfer over to the new salt which has a fairly large alk drop. Just tested my tank and it is at 9.8 dkh. Looking to use the new salt to drop it to 8. I only have enough of my old salt for one more water change on my tanks but I don't want to be too aggressive dropping the level.

I was thinking about do a water change every other day gradually lowering the dkh in the change water? Would this work or would I be better doing my weekly changes with the new salt and letting it drop over a matter of months instead? I have a 30 gallon mixed reef mostly lps but some sps and soft corals and a 15 gallon with just soft corals. Thanks

 

[andrewey]

Whenever I move my alk, I shoot to move it up/down by 0.3-0.5 dkh per day. So far I haven't run into any issues. I'd love to hear about how others move their alk.

 

[LxHowler]

Whenever I move my alk, I shoot to move it up/down by 0.3-0.5 dkh per day. So far I haven't run into any issues. I'd love to hear about how others move their alk.

Thanks for the help. So in your experience dropping alk by 1.8 in 2 weeks should be okay?

 

[andrewey]

Yup, in my experience, two weeks would be just fine.

 

[Pntbll687]

Well, the brs calculator for alk says not to add enough that would raise alk more than 1dkh in a day. The reverse is true as well (unless a doser malfunctioned and you have a tank at 40, then you need to bring it down immediately) don't lower it more than 1dkh per day.

Two weeks is more than enough time to lower the alk.

 

[LxHowler]

Well, the brs calculator for alk says not to add Dante that would raise alk more than 1dkh in a day. The reverse is true as well (unless a doser malfunctioned and you have a tank at 40, then you need to bring it down immediately) don't lower it more than 1dkh per day.

Two weeks is more than enough time to lower the alk.

Great thanks for your help. I thought it would be but I wanted some more input just to make sure

 

[Pntbll687]

Great thanks for your help. I thought it would be but I wanted some more input just to make sure

Are you dosing now?

If not, a couple weekly water changes and you'd be all set

 

[andrewey]

Great thanks for your help. I thought it would be but I wanted some more input just to make sure

It's better to be safe than sorry in this hobby :)

 

[LxHowler]

Are you dosing now?

If not, a couple weekly water changes and you'd be all set

I have been dosing to keep it at the current level because I thought it would be better to have higher alk that was stable rather than alk that would jump up every time I did a water change, I was doing this until it was time to buy more salt when I could lower it to a level I am more happy with and I am just about to run out of salt