How fast can you raise calcium?

www.dinkinsaquaticgardens.com

BrandonS

Well-Known Member
Review score
+0 /0 /-0
View Badges
Joined
Dec 9, 2018
Messages
941
Reaction score
1,094
Review score
+0 /0 /-0
Location
Watsonville
Rating - 0%
0   0   0
Personally I wouldn't do more than 30ppm at a time but thats me. I have also not had any ill effects doing 50 at once but 200 is a bit much.

What is the time between your last test which looked normal and this one? new corals? any big changes?
 
World Wide Corals

Billldg

My Gem Tang Is Watching You
Review score
+0 /0 /-0
View Badges
Joined
May 14, 2018
Messages
17,478
Reaction score
121,813
Review score
+0 /0 /-0
Location
Georgia
Rating - 0%
0   0   0
K, let me ask you this...When was the last time you tested Cal and it was at your normal readings?

I am trying to get a gauge on how quickly it dropped.
 
Last edited:
OP
R

Riotjj21

Active Member
Review score
+0 /0 /-0
View Badges
Joined
Jan 18, 2021
Messages
121
Reaction score
23
Review score
+0 /0 /-0
Location
Laguna Niguel
Rating - 0%
0   0   0
Is there precipitation in the tank? How do your corals look?
I've always heard don't change alk more than .5 and calcium more than 50 per day.
Everything looks fine. A freaking mystery. I raised it 100 ppm per a post on reef central. Well see how they look tomorrow. I lowered the lights significantly until this is resolved. Less light less growth less looking for calcium and carbonate, I'm hoping.
 

Garf

2500 Club Member
Review score
+0 /0 /-0
View Badges
Joined
Oct 23, 2020
Messages
3,572
Reaction score
4,356
Review score
+0 /0 /-0
Location
BEEFINGHAM
Rating - 0%
0   0   0
Everything looks fine. A freaking mystery. I raised it 100 ppm per a post on reef central. Well see how they look tomorrow. I lowered the lights significantly until this is resolved. Less light less growth less looking for calcium and carbonate, I'm hoping.
I don’t think it can just go down without using up over 10dkh in alkalinity. You checked salinity?
 

Spare time

7500 Club Member
Review score
+0 /0 /-0
View Badges
Joined
Apr 12, 2019
Messages
9,322
Reaction score
7,197
Review score
+0 /0 /-0
Location
Here
Rating - 0%
0   0   0
I don't think it matters. I would just spread it out over a day to prevent precipitation where you dose it. It's not like calcium is going to be toxic or affect pH or anything.
 
Top Shelf Aquatics
World Wide Corals

Rmckoy

5000 Club Member
Review score
+0 /0 /-0
View Badges
Joined
Mar 24, 2013
Messages
6,715
Reaction score
8,412
Review score
+0 /0 /-0
Location
Ontario Canada
Rating - 0%
0   0   0
No more than 50 ppm per day, but I agree, something isn't adding up. I don't even know if its possible to have a reading that low. What's your ALK at? K, just saw, your Alk is at 9.5 DKH.

@Randy Holmes-Farley
This was my original thought .
How is it even possible to have higher alk but cal so low .

referring to Randy’s handy calculator I use for dosing .
with alk at 7.5 dkh ( 134ppm ) the relative cal
Is 425

Without even checking cal I check alkalinity and dose both parts of 2 part knowing exactly what my calcium is going to be without testing
 
Zoanthids.com
OP
R

Riotjj21

Active Member
Review score
+0 /0 /-0
View Badges
Joined
Jan 18, 2021
Messages
121
Reaction score
23
Review score
+0 /0 /-0
Location
Laguna Niguel
Rating - 0%
0   0   0
Can you check some freshly made up saltwater, for calcium?
Done. CA red sea coral pro 425. Supposed to be 450 at 78 and 1.026 according to label Did a 20 percent water change. We'll see tomorrow AM what it reads. Corals all look good so we'll see tomorrow.
 
OP
R

Riotjj21

Active Member
Review score
+0 /0 /-0
View Badges
Joined
Jan 18, 2021
Messages
121
Reaction score
23
Review score
+0 /0 /-0
Location
Laguna Niguel
Rating - 0%
0   0   0
Has anything change is your aquarium setup recently? New equipment, new media, manufacturer change in media, dosing, or supplements?
Yes last Sat I started red sea coral pro salt. Did a 50 percent water change because my nitrates were at 20 ppm. Tested afterwards all parameters were fine. CA 450, dKh 9, mg 1350. I usually lose 30 ppm ca/day, Alk 1.5/day pH buffered at 8.2-8.35 swing per day
 
Top Shelf Aquatics

Randy Holmes-Farley

Reef Chemist
Review score
+0 /0 /-0
View Badges
Joined
Sep 5, 2014
Messages
55,990
Reaction score
49,380
Review score
+0 /0 /-0
Location
Arlington, Massachusetts, United States
Rating - 0%
0   0   0
Let's stay on topic. How much can I raise Ca in ppm a day?

It is on topic to very strongly drive home the potential for it to be test error, because you will create a problem that didn't exist.

If you do not know how it got there, it is likely a test problem. Calcium does not just drop 200 ppm overnight.

It would take a massive amount of alk dosing without any calcium. Like about 30 dKH worth.

But, if it really is that low, I'd raise it higher than the normal rate because it is very stressful. Maybe 50 ppm per day.
 

Randy Holmes-Farley

Reef Chemist
Review score
+0 /0 /-0
View Badges
Joined
Sep 5, 2014
Messages
55,990
Reaction score
49,380
Review score
+0 /0 /-0
Location
Arlington, Massachusetts, United States
Rating - 0%
0   0   0
I don't think it matters. I would just spread it out over a day to prevent precipitation where you dose it. It's not like calcium is going to be toxic or affect pH or anything.

The calcium isn't, but the concern is impurities in it.
 

How do I get smarter in the hobby?

  • Experiment with reefing

    Votes: 267 56.9%
  • Read books

    Votes: 180 38.4%
  • Subscribe to magazines

    Votes: 77 16.4%
  • Read Reef2Reef

    Votes: 359 76.5%
  • Talk to other reefers

    Votes: 272 58.0%
  • Watch YouTube videos

    Votes: 306 65.2%
  • Listen to podcasts

    Votes: 115 24.5%
  • Other

    Votes: 40 8.5%
Tropic Marin USA
Top