High Alkalinity, Low Calcium and Normal Magnesium

https://www.triton.de/en/

MysticSea

Active Member
View Badges
Joined
Sep 14, 2019
Messages
114
Reaction score
106
As you know from the title I have been dealing with a alkalinity problem for a few days now. I have been doing 15% water changes and am now thinking of doing a 50% water change because it seems to not improve. Here are my results:

Alkalinity: 20.0 dKH (probably higher) (Hanna, Salifert and Red Sea)
Calcium: 220 ppm (Hanna, Salifert and API)
Magnesium: 1350 ppm (Salifert)

Now I use multiple test kit brands from Hanna to API so I have multiple ways to check results. Please let me know what else can be done or if there is anything else.
 
Aquarium Specialty - dry goods & marine livestock

Snoopy 67

Well-Known Member
View Badges
Joined
Jan 11, 2019
Messages
720
Reaction score
464
There is a relationship between the 3, Magnesium is the catalyst.
Bring up the calcium to over 350 & let the alkalinity drop.
Your salt mix could be part of the problem. Check how it mixes @ the prescribed salinity.
If you empty the syringe on a Salifert Kit use a second & add up the results for the final figure.
 
Corals.com

vetteguy53081

Well known Member and monster tank lover
View Badges
Joined
Aug 11, 2013
Messages
34,495
Reaction score
78,113
Location
Sheboygan
Alk is dangerously high in which corals should have responded prroly or bleaching.
I would suggest to take a water sample to a trusted LFS and have them verify these readings for you and for comparison to your tests.
That is like off the charts X 2 !!
 

Randy Holmes-Farley

Reef Chemist
View Badges
Joined
Sep 5, 2014
Messages
40,150
Reaction score
28,311
Location
Arlington, Massachusetts, United States
Do you know how the alk got that high?

Did you add any buffers or alk additives?

DO NOT USE the well water for anything unless you take it to 0 ppm TDS with an RO/DI as tap and well water can add lots of things, including alkalinity, and perhaps that is how you got there in the absence of adding anything.

Do you use artificial cement based rock? If not fully cured, it can boost alk and pH.
 
https://www.triton.de/en/

Do you have an Aquarium Equipment & Husbandry Maintenance Schedule?

  • Yes equipment ad husbandry

    Votes: 105 54.4%
  • Yes but equipment only

    Votes: 10 5.2%
  • Yes but husbandry only

    Votes: 24 12.4%
  • No I currently do not

    Votes: 52 26.9%
  • Other (please explain)

    Votes: 2 1.0%

Online statistics

Members online
2,330
Guests online
5,599
Total visitors
7,929
The Random Flow Generator™ Nozzle by VCA
Top