Calcium Hovering

Travis Stewart · Apr 28, 2020

Calcium has been hovering around 400. Happy that it’s there and not 350, but thinking it’s precipitating out as I’ve added more daily to be added and it’s pretty steady at 400ppm. Curious how this works and how to fix it. Thanks!

Magnesium 1380
Alk 8.3

Randy Holmes-Farley · Apr 28, 2020

Most likely, you just didn't add enough to accurately measure with a hobby kit.

What amount of what product did you add to what water volume?

Are you monitoring alkalinity? Calcium cannot precipitate without taking down a lot of alkalinity.

Travis Stewart · Apr 28, 2020

Randy Holmes-Farley said:
Most likely, you just didn't add enough to accurately measure with a hobby kit.

What amount of what product did you add to what water volume?

Are you monitoring alkalinity? Calcium cannot precipitate without taking down a lot of alkalinity.

hey Randy,

dosing about 30mL of ESV 2 part along with a hair less alk alternating hourly with mag in between.
Monitoring both daily.

Randy Holmes-Farley · Apr 28, 2020

Travis Stewart said:
hey Randy,

dosing about 30mL of ESV 2 part along with a hair less alk alternating hourly with mag in between.
Monitoring both daily.

What tank water volume?

You are probably just matching the demand, since you are also adding alk.

Travis Stewart · Apr 28, 2020

Randy Holmes-Farley said:
What tank water volume?

You are probably just matching the demand, since you are also adding alk.

tank water volume is about 80-90 gallons considering rock and sand displacement.

i have had consistent levels in past and have good success with my coral growth the past two years..

adjusting the amount dosed should eventually bring cal up but not doing so currently.

Travis Stewart · May 1, 2020

Randy Holmes-Farley · May 1, 2020

You are dosing about 0.7 dKH of alk and 5.5 ppm of calcium per day.

That could easily just be offsetting the demand in the tank and one might easily not see calcium change.

If you want to see calcium higher, add just the calcium part to boost it. Maybe something like 130 mL split over a few doses in 1-2 days. That's in addition to your regular dosing amount.