Kalkwasser

foneman02 · 01/05/2018, 02:36 PM

Want to start dosing kalkwasser thru ato water . Dkh has never dropped below an 8. Only calcium drops over time. If I dose with kalkwasser will this effect my Dkh level.

scuzy · 01/05/2018, 03:39 PM

Kalk will raise alk as well.

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nereefpat · 01/05/2018, 04:07 PM

Quote:

Originally Posted by scuzy

Kalk will raise alk as well.

Sent from my iPhone using Tapatalk Pro

Yep.

Somewhere around 1dKH per 7ppm Ca.

bertoni · 01/05/2018, 04:16 PM

Kalk adds calcium and alkalinity in the ratio in which corals and coralline consume them. Are you adding any buffer products? They all add alkalinity, and can cause this effect. There are some other stealth sources of alkalinity, like tap water and artificial rock, as well.

foneman02 · 01/06/2018, 10:09 AM

Not using any buffers. I do a 25% water change every 3 weeks. Using Io salt. Calcium drops very slowly. Have at least 100 lbs of live rock in a 120 tank and a 30 gal sump/ refugium. Also started adding some acros plenty of soft stuff. Water coming out of RO unit is a 7 dkh.

nereefpat · 01/06/2018, 01:26 PM

Quote:

Originally Posted by foneman02

Water coming out of RO unit is a 7 dkh.

Huh? RO water will have zero alkalinity. IO saltwater should have alk around 9 dKH.

bertoni · 01/07/2018, 01:05 AM

I agree that 7 dKH is very high for RO water. Is that a typo?

01/05/2018, 02:36 PM	#1
foneman02 Registered Member Join Date: Feb 2012 Posts: 22	Kalkwasser Want to start dosing kalkwasser thru ato water . Dkh has never dropped below an 8. Only calcium drops over time. If I dose with kalkwasser will this effect my Dkh level.

01/05/2018, 04:16 PM	#4
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	Kalk adds calcium and alkalinity in the ratio in which corals and coralline consume them. Are you adding any buffer products? They all add alkalinity, and can cause this effect. There are some other stealth sources of alkalinity, like tap water and artificial rock, as well. __________________ Jonathan Bertoni

01/07/2018, 01:05 AM	#7
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	I agree that 7 dKH is very high for RO water. Is that a typo? __________________ Jonathan Bertoni

01/05/2018, 03:39 PM	#2
scuzy Registered Member Join Date: Sep 2003 Location: San Jose, CA Posts: 6,499	Kalk will raise alk as well. Sent from my iPhone using Tapatalk Pro

01/06/2018, 10:09 AM	#5
foneman02 Registered Member Join Date: Feb 2012 Posts: 22	Not using any buffers. I do a 25% water change every 3 weeks. Using Io salt. Calcium drops very slowly. Have at least 100 lbs of live rock in a 120 tank and a 30 gal sump/ refugium. Also started adding some acros plenty of soft stuff. Water coming out of RO unit is a 7 dkh.