How long for calcium to drop?

[authentic]

I let my calcium get to 530 and immediately stopped dosing,in two weeks it has dropped to 500
Howling does it take for calcium to dtop?I expect it depends on the tank but my tank is full of sps and required 100 ml per day before my parameters went out of wacky (low magnesium levels)

 

[Ashish Patel]

How much tank volume? I would imagine it would take a 2-4 weeks if not longer. CA never depletes like ALK so I would take the time to do the largest waterchange your tank can handle. Personally if my CA got to 530 (Current levels around 420), I would do a few 25% waterchanges, as well as stop CA dosing. Should do it slowly perhaps in 7 days. Good luck..

 

[Ashish Patel]

Also, I am not a fan of doing 1 of each 2part not equally. I find it just keeps both levels more in balance when dosed together aswell as just wastes (perspitates) outs when not dosed in equal parts. How much is your current ALK levels?

 

[authentic]

Current alk 8.5, I was dosing equally but my mag was extremely low...calcium built up ,alk was staying around7.5 ,stopped dosing calcium..doing water changes,,,will be switching to calcium reactor when the dust settles

 

[Randy Holmes-Farley Verified Community Expert]

What size tank? From the size of the tank and the 100 mL per day of the additive (which additive?) we can determine what you had been adding each day using a calculator like this:

http://reef.diesyst.com/chemcalc/chem_calc3.html

 

[authentic]

140 gal
Calcium chloride

 

[Randy Holmes-Farley Verified Community Expert]

140 gal
Calcium chloride

What recipe did you use to make the 100 mL?