Very low Calcium levels

[daplatapus]

A couple quick questions come to mind:
What salt are you using?
What are you dosing thus far, how much and when?
What's your tank size (total water volume) and composition (sps, LPS, clams etc)?

[Enigma]

What test are you using? Have you compared it to a known sample?

[windcoast reefs]

Originally Posted by Enigma

What test are you using? Have you compared it to a known sample?

I use ELOS and API test kits, both read out exactly the same. I compared this to my freshly mixed saltwater which is testing at the correct levels.

[Aquattro]

Don't kill those frags!!

[windcoast reefs]

Originally Posted by Aquattro

Don't kill those frags!!

Lol I think they will be okay for the night!

[windcoast reefs]

Originally Posted by daplatapus

A couple quick questions come to mind:
What salt are you using?
What are you dosing thus far, how much and when?
What's your tank size (total water volume) and composition (sps, LPS, clams etc)?

Ive been using instant ocean for the last year and a bit, and I do water changes every week (25 gallons)

Im dosing seachem reef advantage (approximately 12 teaspoons in 1L) and brightwell alkalin8.3 (14 tsp in 1L) spread out over 1 week. Also I use a low concentration of kalkwasser in my ATO to even out any alk swings.

It is a SPS based tank, and I have only manually dosed in the past. 80% of my corals are still frags.