reefkeeper 2

Here's some info I gleaned from a google search:
From http://www.salt-city.org/showthread.php?t=140

Here are the advantages of the Jr over the RK2:

- Can control up to 12 devices. RK2 only controls 8.
- Seasonal lighting variation. Not present on RK2.
- Seasonal temperature variation. Not present on RK2.
- Moon Cycle simulation. Not present on RK2.
- Datalogging of pH and temperature. Not present on RK2.
- Temperature compensation of pH. Not present on RK2.
- Much more flexible configuration on the Jr.
- Jr less expensive $250 vs. $270 for RK2 equivalent configuration.

On the Jr w/ the serial port option these additional features are available (none present on the RK2):
- Computer Interface so that it may be connected to a PC.
- Digital input. (can connect to float switch, water on floor sensor, power fail sensor, etc.)

- With AquaNotes Lite (free)
- datalogs are stored in the database.
- Graph of the datalogs.
- configure controller through PC.

- With the Full version of AquaNotes
- Email alarms.
- Web access of the controller.
- Event logging.


Another link
http://reefcentral.com/forums/showthread.php?s=&threadid=825724&perpage=10&pagenumber=1
 
<a href=showthread.php?s=&postid=11035180#post11035180 target=_blank>Originally posted</a> by js_bass
Wow, that couldnt be more hopefully. Is there really a big difference between acjr and ac3.

Night and day, but it is also reflected in their prices. ACJr will do most of your everyday things, but is limited when you get into the advanced tuning and web site aspects. The one thing I really don't like about my Jr is the inability to add a second ph probe to better control and monitor my Calcium Reactor.
 
<a href=showthread.php?s=&postid=11035312#post11035312 target=_blank>Originally posted</a> by Atticus
Night and day, but it is also reflected in their prices. ACJr will do most of your everyday things, but is limited when you get into the advanced tuning and web site aspects. The one thing I really don't like about my Jr is the inability to add a second ph probe to better control and monitor my Calcium Reactor.

You can come out of the corner anytime, man. :bum:
 
So far I really like my ACII and you can get them used pretty cheap. It will control more than the jr as well.
 
If your going to have a reef tank for a long time and your planning on keeping anything advanced coral wise/ equiptment wise I'd just get an AC3, it's going to cost you more but will be well worth it in the end.
 
<a href=showthread.php?s=&postid=11036150#post11036150 target=_blank>Originally posted</a> by jbrunken
I'm just waiting for the AC4 to come out so the market will be flooded with used AC3's...

:)

ditto, though i am considering getting an AC JR as long as I can get it so it can be monitored through the web.
 
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