Red Sea Dosing High Calcium

Office_Reef

New Member
View Badges
Joined
Nov 7, 2025
Messages
12
Reaction score
4
Location
Sydney
What state or country do you live in
Australia
Rating - 0%
0   0   0
I started dosing my 200L Red Sea reef tank about a month ago with the 4-part dose mix and my calcium is creeping up from 400-480 ish.
I know I need to reduce the dosing volume but can I only reduce the Calc/Mag dose, or do I need to reduce them all proportionally?

Cheers!
 
I started dosing my 200L Red Sea reef tank about a month ago with the 4-part dose mix and my calcium is creeping up from 400-480 ish.
I know I need to reduce the dosing volume but can I only reduce the Calc/Mag dose, or do I need to reduce them all proportionally?

Cheers!
I have a Red Sea Nano XL and have the same problem. I was using their dosing calculator and my Calcium got as high as 500 with alkalinity in the 13 dkh range. I stopped dosing for two weeks and things are better now numbers wise. I restarted dosing and just cut in half what the calculator recommended. Parameters are better now. You do have to follow their ratios of doubling the second bottle and halving the third and fourth bottle amounts compared to whatever you dose for bottle number one.

You can reduce only calcium which is bottle one if only calcium is high I guess, but for me that did not fix all the other high parameters.
 
I started dosing my 200L Red Sea reef tank about a month ago with the 4-part dose mix and my calcium is creeping up from 400-480 ish.
I know I need to reduce the dosing volume but can I only reduce the Calc/Mag dose, or do I need to reduce them all proportionally?

Cheers!
I have a Red Sea Nano XL and have the same problem. I was using their dosing calculator and my Calcium got as high as 500 with alkalinity in the 13 dkh range. I stopped dosing for two weeks and things are better now numbers wise. I restarted dosing and just cut in half what the calculator recommended. Parameters are better now. You do have to follow their ratios of doubling the second bottle and halving the third and fourth bottle amounts compared to whatever you dose for bottle number one.

You can reduce only calcium which is bottle one if only calcium is high I guess, but for me that did not fix all the other high parameters.
Thanks mate, awesome!
 
I agree to reduce just calcium.

Are you dosing by pump and do you know if it is actually dosing the amount you expect?
 
I agree to reduce just calcium.

Are you dosing by pump and do you know if it is actually dosing the amount you expect?
I recalibrated mine. There is no way to know its dosing the correct amount unless you sit there during the day and measure each dosing head. Mine is dosing 6.3cc over 18 doses/24 hours.
 

TOP 10 Trending Threads

WHAT’S YOUR MOST MEMORABLE EXPERIENCE WITH A CORAL THAT LOOKED LIKE IT MIGHT NOT MAKE IT?

  • I’ve seen a dramatic comeback. I would have sworn it was a goner

    Votes: 18 43.9%
  • A slow recovery, and it got back to looking healthy

    Votes: 7 17.1%
  • It came back some, but never looked as good as it used to

    Votes: 3 7.3%
  • I tried to save one, but it didn’t make it

    Votes: 7 17.1%
  • Mine is still struggling...no comeback yet

    Votes: 3 7.3%
  • I’ve never had a coral in serious trouble

    Votes: 0 0.0%
  • See, this is why I don’t keep corals

    Votes: 1 2.4%
  • Other (Post in the comments)

    Votes: 2 4.9%
Back
Top
Home
Post thread…
Market
What's new