Freshly mixed saltwater alk is too high

[DarkSky]

Hey,

I'm using plain old Instant Ocean for water changes, but the alkalinity of freshly mixed water is too high - around 10 dKh.

I'd like to lower it down around 8 dKh - I'm assuming I can add something to the water to accomplish this, an acid maybe?

Thanks.

 

[Old Fritz]

That's a normal alkalinity

 

[DarkSky]

That's a normal alkalinity

Normal for what? Natural sea water is around 7. I'm having SPS with burnt tips because of my low nutrient, high light system, so I need to lower alkalinity.

 

[Old Fritz]

Most people run alkalinity anywhere from 7-11 dKh. Now that you say youre getting burnt tips on your corals that changes the story

 

[mta_morrow]

Please see this, I had the same question.

I understand wanting to match alkalinity for water changes.

https://www.reef2reef.com/threads/h...y-mixed-salt-before-adding-to-display.434075/

 

[acro-ed]

You can use hydrochloric acid to lower it, but you need to aerate when you do so. Only do this for water mixing in your vat; not in your tank.

I've been using regular I/O also and getting about 9.3dkh lately. I switched from Reef Crystals (and RSCP before that) because they were way too high.

 

[Old Fritz]

You can use hydrochloric acid to lower it, but you need to aerate when you do so. Only do this for water mixing in your vat; not in your tank.

I've been using regular I/O also and getting about 9.3dkh lately. I switched from Reef Crystals (and RSCP before that) because they were way too high.

That works. Also what type of water are you mixing with salt, is it tap, distilled, ro?

 

[acro-ed]

That works. Also what type of water are you mixing with salt, is it tap, distilled, ro?

RODI

 

[DarkSky]

Please see this, I had the same question.

I understand wanting to match alkalinity for water changes.

https://www.reef2reef.com/threads/h...y-mixed-salt-before-adding-to-display.434075/

Thanks, that's what I was looking for!

 

[mta_morrow]

Thanks, that's what I was looking for!

No problem. Glad I could help!

 

[LobsterOfJustice]

I use sodium bisulfate, Randy has a thread on it. I like that I can get it lab grade purity from amazon unlike muratic acid from the hardware store.

 

[DarkSky]

I use sodium bisulfate, Randy has a thread on it. I like that I can get it lab grade purity from amazon unlike muratic acid from the hardware store.

Do you have a link for that thread?