Converting from kalk to 2 part

spscrackhead · 01/25/2017, 12:20 AM

I get the rest of my supplies to run 2 part on Friday and was looking for some suggestions on how much to dose.
The tank is a 175 with 30 gallons in sump. I currently mix 6 heaping tbsp of kalk into 11 gallons of ato. This top off lasts a bit less than a week. I would say I have to refill about 6 times a month.
I have 3 brs dosing pumps that will be hooked up to u apex. One for calc, one for alk, and one for mag. I would like to keep the Ph stable, so dose the alk at night. What would be good starting dose be? If anyone has good apex programs that would be great as well.
Thanks!

bertoni · 01/25/2017, 08:01 PM

Do you know the amount of evaporation per day? The 2-part is 45x more concentrated than Kalkwasser. If not, I'd measure and dose at least once a day for a while, to get a trend line. I think most tanks will be fine with daily dosing, at least for a few days. What corals do you have? Some are more touchy about alkalinity swings.

spscrackhead · 01/25/2017, 11:18 PM

The tank consists of about 10 zoa frags, and 5 sps mini colonies, 17 sps frags, 3 lps corals the frogspawn is decent size but bigger than a softball.

bertoni · 01/25/2017, 11:21 PM

I'd probably measure morning and evening, and dose as needed, at least for a day or two, to keep any possible alkalinity swing down. Some of the frags might be unhappy with a big downward drop. If you know the evaporation rate, you probably can get a reasonable close guess, but losing corals is painful.

Tarawa · 01/27/2017, 06:48 PM

when I converted from kalk to two-part, I used this calc: https://www.hamzasreef.com/Contents/...ntribution.php

It got the levels pretty close (slight rise in both Ca/Alk) which was fine for my tank. Tho like Bertoni pointed out, you'd still need to figure how much you're evaporating per day.

01/25/2017, 12:20 AM	#1
spscrackhead Registered Member Join Date: Sep 2007 Location: Waddell AZ Posts: 696	Converting from kalk to 2 part I get the rest of my supplies to run 2 part on Friday and was looking for some suggestions on how much to dose. The tank is a 175 with 30 gallons in sump. I currently mix 6 heaping tbsp of kalk into 11 gallons of ato. This top off lasts a bit less than a week. I would say I have to refill about 6 times a month. I have 3 brs dosing pumps that will be hooked up to u apex. One for calc, one for alk, and one for mag. I would like to keep the Ph stable, so dose the alk at night. What would be good starting dose be? If anyone has good apex programs that would be great as well. Thanks! __________________ hobby???? are you serious this is an ADDICTION

01/25/2017, 08:01 PM	#2
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	Do you know the amount of evaporation per day? The 2-part is 45x more concentrated than Kalkwasser. If not, I'd measure and dose at least once a day for a while, to get a trend line. I think most tanks will be fine with daily dosing, at least for a few days. What corals do you have? Some are more touchy about alkalinity swings. __________________ Jonathan Bertoni

01/25/2017, 11:18 PM	#3
spscrackhead Registered Member Join Date: Sep 2007 Location: Waddell AZ Posts: 696	The tank consists of about 10 zoa frags, and 5 sps mini colonies, 17 sps frags, 3 lps corals the frogspawn is decent size but bigger than a softball. __________________ hobby???? are you serious this is an ADDICTION

01/25/2017, 11:21 PM	#4
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	I'd probably measure morning and evening, and dose as needed, at least for a day or two, to keep any possible alkalinity swing down. Some of the frags might be unhappy with a big downward drop. If you know the evaporation rate, you probably can get a reasonable close guess, but losing corals is painful. __________________ Jonathan Bertoni

01/27/2017, 06:48 PM	#5
Tarawa Registered Member Join Date: Feb 2014 Posts: 245	when I converted from kalk to two-part, I used this calc: https://www.hamzasreef.com/Contents/...ntribution.php It got the levels pretty close (slight rise in both Ca/Alk) which was fine for my tank. Tho like Bertoni pointed out, you'd still need to figure how much you're evaporating per day.