Zoas closed, high alkalinity, vitamin c from CVS to lower?

[Radiant Reefs]

I have a new aquarium used red sea coral pro slat with has elevated levels of alkalinity and now zoas are closed(believe this is the reason). I would lile to lower the alkalinity a little and used to do it with vitamin c when working on LFS a couple years back. Haven't quite heard this technique for a while and was wondering if anyone has experience with this, maybe any side effects

 

[NeedMoreReef]

Never heard of using vitamin c to lower ALK.
I had same issue with high ALK using coral pro salt, but switched to Brightwells Neo (about 3 buckets in now) and find my mixed reef does better with it.

 

[littlebigreef]

This question is probably better suited for the chemistry forum.

Now, I’m no chemist. I do dose vitamin C and it’s my understanding that certain buffered brands of absorbic acid can raise the alk... I’ve never heard of it as a means of lowering alk.

 

[Radiant Reefs]

I now feel like testing this out because I've done this in the past and unless a coincidence it actually lowered my alkalinity. I have heard that ph is lowered with works almost conjunction with alkalinity, so has me wondering. Appreciate the help guys, I might take your advice and take this to the chemistry forum.

 

[Gareth elliott]

If you are looking for something to lower alkalinity of a reef look at seachem acid buffer.

go slow, this creates co2 by breaking up bicarbonate. So too fast ph will drop drastically for a short time period. Id start at like -.25 dkh twice a day at least 8 hours apart. this product is sodium bisulfate. The directions are on the product how much to use for x volume. Add to your sump not the display. And again very small amounts at a time:

 

[littlebigreef]

I now feel like testing this out because I've done this in the past and unless a coincidence it actually lowered my alkalinity. I have heard that ph is lowered with works almost conjunction with alkalinity, so has me wondering. Appreciate the help guys, I might take your advice and take this to the chemistry forum.

That may have sounded a bit harsh before, sorry about that. Curious to see if someone with chemistry knowledge can shed some more light on this.