How much can water parameters fluctuate and be fine?

BRS

Schraufabagel

aka Schrauf_tanks
Review score
+0 /0 /-0
View Badges
Joined
Oct 29, 2020
Messages
1,722
Reaction score
5,473
Review score
+0 /0 /-0
Location
Madison, WI
My tank currently consumes 0.2 dkh per day and roughly 10 ppm Ca and 10 ppm Mg per week. I use Red Sea Coral Pro salt which has 11.5 dkh, 450 ppm Ca, and 1350 ppm Mg. Without a water change during a week the dkh would drop by 1.4 along with 10 ppm Ca and Mg. Is this fine if the water change is done? Or does that much fluctuation irritate corals? Ultimately I'm looking at auto dosing and this would decide if 2 channels is fine or if I should do 4. This is for a 25 gallon tank
 
REEFTIDE

Spare time

5000 Club Member
Review score
+0 /0 /-0
View Badges
Joined
Apr 12, 2019
Messages
5,672
Reaction score
3,723
Review score
+0 /0 /-0
I don't think there is as solid answer. Personally, I like to start dosing once the coral starts consuming over .5-1KH a week. BRS says never to raise KH more than 1.4KH at a time, but I am not sure if this has to do more with pH or KH. I think something like all for reef would work for your tank, or a simple 2 part solution (I would say based this off of whether or not your pH averages above 8 or not). I am not sure why you would need a 4 channel doser given that your water changes will be more than enough for magnesium (and I also am not sure what the 4th would be for).
 

dedragon

2500 Club Member
Review score
+0 /0 /-0
View Badges
Joined
Feb 23, 2019
Messages
3,357
Reaction score
2,496
Review score
+0 /0 /-0
If youre not dosing and not having an issue I would probably stick to all for reef for the moment as well. 1 dosing pump and done just monitor the calcium and magnesium changes for the first couple of weeks after to make sure everything is keeping up with alk
 
OP
Schraufabagel

Schraufabagel

aka Schrauf_tanks
Review score
+0 /0 /-0
View Badges
Joined
Oct 29, 2020
Messages
1,722
Reaction score
5,473
Review score
+0 /0 /-0
Location
Madison, WI
I don't think there is as solid answer. Personally, I like to start dosing once the coral starts consuming over .5-1KH a week. BRS says never to raise KH more than 1.4KH at a time, but I am not sure if this has to do more with pH or KH. I think something like all for reef would work for your tank, or a simple 2 part solution (I would say based this off of whether or not your pH averages above 8 or not). I am not sure why you would need a 4 channel doser given that your water changes will be more than enough for magnesium (and I also am not sure what the 4th would be for).
I use ChaetoGro daily for my refugium. I'll look into All for Reef or 2 part and see how difficult it would be
 
BRS

What do you use?

  • Gfo

    Votes: 25 5.9%
  • Carbon

    Votes: 154 36.4%
  • Carbon & GFO

    Votes: 134 31.7%
  • Water changes

    Votes: 296 70.0%
Southwest Aquaculture - a coral lover's dream!
Top