Calcium Reactor Vs Two-Part Dosing - Carolina Fish Talk
LinkBack Thread Tools Search this Thread Display Modes
post #1 of 3 (permalink) Old 09-21-2016, 05:44 PM Thread Starter
Senior Member
Join Date: Mar 2011
Location: Mount Airy, NC (27030)
Posts: 289
Calcium Reactor Vs Two-Part Dosing

It's all over the forums. But I figured I'd ask the opinion of local members.
I've been debating on this question for quite a while now. And the fact that my current dosing situation is quite demanding. I'm beginning to contemplate the chances of making the switch.
I'm currently on two part dosing. And every weekend I test and seem to need to increase the amount being dosed. As of now my Apex Dos displays 85ml of ALK and 75ml of CAL a day. And I expect an increase this coming weekend.

Anyway, what are your thoughts?
Is a Calcium Reactor worth the initial price. With the added benefits of also adding trace elements from the dead coral skeletons.
Is Two-Part dosing worth sticking with? With the ability to buy it in bulk at a reasonable price. And having to add trace elements .

I'm looking to get the maximum growth, coloration and water stability.

What is our local members opinions/experiences with this topic?
A13X is offline  
Sponsored Links
post #2 of 3 (permalink) Old 11-14-2016, 04:20 PM
Senior Member
Join Date: Oct 2008
Posts: 107
hmmm two-part (or even three part) vs calcium reactor, geez why not just start a war... seriously I have used both so here goes my opinion..

both are very good and grow coral well! But in my mind there is a point where a reactor is worth the changeover...

1) salt stability.. two part will cause a tank to increase salinity. Now my tank often suffers from salt decreasing

2) trace elements.. reactor relies on whatever trace element is in the media, two part whatever is in the mix...

3) overhead cost is lower once the reactor is purchased. I ran my first reactor without a CO2 controller so it is possible to cut a bit there but quickly bought a CO2 controller (run now APEX)

4) while amount of Ca, Carbonate, and Magnesium can be adjusted by flow (increase the flow yields more of each), there is a break point where the water just is not in saturation.

5) lastly big one is fear of PH swings with a Ca Reactor, never had that problem but had a problem when my drip system for two dumped 1liter of A part into system (90 gal) in 24 hours.

All in all, I like the Ca reactor for larger systems or for less daily maintenance. But neither protocols are "no maintenance."

Lately, I have been considering putting a Kalk Reactor back online to provide some PH buffer at night but let the CA Reactor take the bulk of the CA/Carbonate/Mag work.

Lastly, just like all two-parts are not equal so not all CA Reactor medias are not equal. Some need a Mag supplement whereas others have more Mag to start with.

Short answer time: I DIY'ed my first reactor and now have a Koralin that I picked up at a good price and would not likely go back to two-part except for a small all-in-one system.

sntlewis is offline  
post #3 of 3 (permalink) Old 11-14-2016, 04:30 PM
Senior Member
pompeyjohn's Avatar
Join Date: Jul 2010
Location: Durham - 27707
Posts: 1,798
From what I have seen of large builds, sooner or later they all go with a calcium reactor.

if I had the space - I'd have a large tank for just sps, running a a calcium reactor and a kalk reactor. The calcium reactor would do the heavy lifting. The ATO be on a ph controller and would deliver RODI to the tank or water from the kalk reactor. That way you could keep the PH high and rock solid.
pompeyjohn is offline  


Quick Reply

Register Now

In order to be able to post messages on the Carolina Fish Talk forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome