Depressed KH with Calcium Reactor

[spaulr]

I'm still trying to dial in my Calcium Reactor - Korallin 1502. I ended up getting a lid with a ph probe port. The pH inside of reactor is pH controlled between 6.7 and 6.9. I've measured the effluent once and stopped - DKH of 25+ (didn't want to waste my Elos test kit). Tank pH is 8.2-3 during the day and 7.9-8.0 at night.

Somewhere around 10-12 bubbles a minute and 60-70 drips a second of effluent.

Still, with the pH of the reactor dialled in I don't quite understand the low DKH. I did use Randy's 2 part to get things somewhat balenced.

Some other parameters -

SG 1.026
Mg 1275
Ca 400
Kh 8-9 (yesterday same time)
Kh 7 (Today same time)

Corals
Hodags Monti (1")
Candy cane (2")
Lobo Hemprichii (4")
German blue Acro ( 2-3")

Any ideas, or things I can check? First time dialling this in...

 

[ChrisRD]

IMO a dKH of 7 is fine. Is it dropping lower than that? What type of media are you using?

 

[spaulr]

I'm using ARM. I'm going to be checking the DKH everyday so I'll let you know if it does in the next few days.