Calcium reactor ....or manual dosing?

miserkris

New member
Hello,
I've been dosing tech cb parts a&b manually daily.
Assuming I'm in this hobby for next 5yrs....am I better off buying a used geo calcium reactor?

Will it be easier maintenance than dosing manually.whats less work? Whats more economical in long run?

Pls advice! Thanks kris

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About two weeks ago, I installed a Ca reactor (Lifereef) to replace dosing. Ca and Alk levels have remained relatively constant but my sense is that growth is better and the SPS look better. This could certainly be wishful thinking but over the years, my subjective experience is that a reactor seems to get better results. Of course, it's possible that this is wishful thinking based on the cost of the reactor but I really don't think so.

I've also dosed Kalk in my topoff and I've never really been pleased with the results but that is likely due to a lack of sufficient evaporation.

If you do get a reactor, make sure to get the upgraded regulator, needle valve, ph port, and quick disconnects. They are a great investment and will make it much closer to (but not quite) set it and forget it.
 
I have a calcium reactor on my 290 and recently added a 3-part dosing pump to help out. I like calcium reactors but, IME, they need constant attention. I have a Korallin 300c(rated for 800 gallons). The tank has some large SPS colonies so the demand for alk and calc is very high. I had to have the effluent running above 200 ml/min to keep up. Because of this the PH in the tank dropped down very low. I was also going through media and Co2 way too fast. Every time I had to change media I would get an alk drop and my corals would suffer big time.

If your tanks demand is not that high then you shouldn't have a problem with the reactor if you get a good ph controller (I have milwaukee sms122 and like it), Co2 regulator (aquariumplants.com), Co2 proof airline, and pinch valve or needle valve (the needle valves clogged on me). If you cannot consistently control how much Co2 is going in and how much effluent is coming out you are going to pull your hair out!

This has been my experience with the Korallin. I cant speak for the Geo and I know many people have had great success with them. I have many dosing pumps on my tanks and I love the simplicity and fine tuning.
 
Great post Met. I agree about keeping the Ca Reactor adjusted. That's why I strongly recommend the upgraded part usually offered for additional cost on the reactor. I had a Korralin previously and I think the Lifereef is easier to adjust. I also like the circulation design on it.

As an added suggestion, if your reactor doesn't have a 'oil filled' bubble counter, that is another great upgrade.
 
I just switched to a calcium reactor myself from using two part and dosing pumps. It took me ~2weeks to get it dialed in, but that was more learning curve on my part. Like Stolireef, I feel my coral has better polyp extension and color since I've switched. Why, I don't know, but I like to think there is some trace elements being released that I was lacking with just two part, I don't know. Since being dialed in the reactor has been "set it and forget it". I glance at my effluent and ph controller once in a while and that's it. One other thing, if you get the aquariumplants regulator, you don't even need a bubble counter, it's that precise. Oh, and I am using a GEO reactor as well.
 
Tmc,
without the bubble counter, how can you figure out how much co2 you are adding (other than using the ph to manage co2).

I'd love to stop counting bubbles so I'm all ears. Thanks.
 
I like my calcium reactor where it is ,on the shelf off line. I get the best results with kalk dosing 24/7 from a still reservoir via a timed perstaltic pump and have over the last 4 plus years.

IME CaCO2 reactors require considerable attention and can have difficulty maintaining constancy in alk and calcium. I'm also concerned about any impurities the media may hold which can be released as it dissolves. Corals and other organisms that make the aragonite stash things they don't need in skeletal mass, like PO4,strontium, and potentially metals and other bad things; not to mention potential processing impurities by the manufacturer, I don't want freed up in my tanks. Kalk is self purifying ; it meets the needs for my system which is packed with growing sps with only an occasional tweak with baked baking soda to help.
Many like the technology and have reported some success with CaCO3 reactors, whether viewed through rose colored glasses or with clear eyes, but enough encounter difficulty to make it a questionable choice, imo. Kalk and then 2 automated two part dosing are my preferences.
 
Tmc,
without the bubble counter, how can you figure out how much co2 you are adding (other than using the ph to manage co2).

I'd love to stop counting bubbles so I'm all ears. Thanks.


Stolireef, Read the link that Tat2demon posted on the regulator. The regulator itself has a dial that you just turn and set for your bubble count, that's it, you won't be counting bubbles anymore.
 
If you do get a reactor, make sure to get the upgraded regulator, needle valve, ph port, and quick disconnects. They are a great investment and will make it much closer to (but not quite) set it and forget it.

If you want your reactor to be set and forget, run it with a masterflex pump. You can get them on ebay for a reasonable price and it will pretty much guarantee consistent clog free effluent 24/7. That pump was just as good of an investment as my calcium reactor itself.
 
+1 on the GEO reef Ca Reactor.
Once dialed in, it keeps pH, Ka & Ca nice and stable.
I have the Co2 solenoid controlled by my RKL to not go below 8.05, but usually stays between 8.1-8.3 :-)
 
TMZ:

I can certainly agree that I'm a bit of a gadget hound (as are many reefers). I think you raise some great points, especially regarding media purity. That's something I really haven't considered. Do you know of anyone that has done a chemical analysis of Ca Reactor media?

I do however think that Kalk dosing can be 'situation dependent' as far as effectiveness is concerned. By way of example, I have a 110 with LED lighting (yes, I know, proof positive of being a gadget freak). As a result of the LED lighting, I don't need fans and my evaporation rate is quite low compared to when I was using halides. The same might apply to someone using a chiller. In that setting, I don't believe Kalk alone would be sufficient to keep up with demand and I'd end up doing significant 2 part dosing along with the Kalk. This comination would likely be as or more complex than just using the reactor.

Who knows? I may end up having to supplement the reactor with either 2 part or Kalk. Time will tell.
 
For the OP's 75g mixed reef, I'd go with kalk or a 2-part dosing pump.

If you had a larger tank or plan for one (150gal+), or higher calcium demand (SPS-dominant tank and clams), then a calcium reactor may be a better choice. I do have a larger 180g tank and have a GEO reactor with Aquarium Plants carbon doser regulator.
 
TMZ:

I can certainly agree that I'm a bit of a gadget hound (as are many reefers). I think you raise some great points, especially regarding media purity. That's something I really haven't considered. Do you know of anyone that has done a chemical analysis of Ca Reactor media?

I do however think that Kalk dosing can be 'situation dependent' as far as effectiveness is concerned. By way of example, I have a 110 with LED lighting (yes, I know, proof positive of being a gadget freak). As a result of the LED lighting, I don't need fans and my evaporation rate is quite low compared to when I was using halides. The same might apply to someone using a chiller. In that setting, I don't believe Kalk alone would be sufficient to keep up with demand and I'd end up doing significant 2 part dosing along with the Kalk. This comination would likely be as or more complex than just using the reactor.

Who knows? I may end up having to supplement the reactor with either 2 part or Kalk. Time will tell.

If it works for you and you are happy with it that's good and I won't try to change your mind.
The thread needed some counterpoint anyway and my experience with CaCO3 reactors is less stellar than yours.
I used my reactor for a couple of years ;first alone and then with kalk dosing. As time went on and media dissolved ,constancy in alk became an issue,so I abandoned it in favor of 24/7 kalk with a side addition of a bit of baked baking soda (about 1table spoon per week for the 600 gallons) I like calcium hydroxide(kalk) and bumping it with a little baking soda and calcium chloride if necessary. This process seems simpler with more direct control over what I'm dosing .
I have nothing against technology ;many enjoy that part of the hobby more than others. I like it but don't mind some manual activity along with it. I suppose I could just add a dosing pump for the bakinsoda addition but haven'tdone sothough I've hadthe pump for a while now..

By way of comparing complexity , kalk dosing takes: a container, like a bucket or garbage can, a peristaltic pump or diaphram pump and a timer ; a months worth can be mixed at one time. Two part would require one pump for each part . Something like a bubble magnus doser which comes with 3 built in pumps and timers and dosing sets could do it all. So for a kalk and two part automated set up : 1 triple doser pump , 3 refills per month. For just two part two pumps and two mixes .

vs.:
a a CO3 reactor, two pumps, CO2 container to refil from time to time,ph controller with solenoid ,regualtor , maybe a second container for a second media course to raise ph.. managing CO2 levels , monitoring CO2 container pressure, calibrating your controller probe, watching the media to be sure it doesn't clog or slow the flow, fifring out how to offset ph drops. . It's been a while so I'm sure a missed something.
BTW,If your system is closed with low evaporation then air exchange would be minimal too and you are dosing low ph effluent. How do you counteract low ph? What ph are you able to maintain with justthe CACO3 reactor in play.
 
Great point you have made there, i never had a reactor but to me somehow i have a feeling of better control for parameters and even costs. Kalk is very cheap. If you buy bulk calcium and alk you get also very cheaply. With the initial hands on you can also learn a bit about the relationship between mg ca and alk as you adjust each while you stock increases. You feel more of a creator if not... Godlike.
 
Mr.mole ,
Thx.
Whats best brand that is cheapest when buying bulk ca,alk?
I buy big bottles of kent tech cb....parts a&b....~$15 each.....lasts for 3mo.
 
Okay you can check bulkreefsupply you can get 7lb of calcium chlorite at 17.9$. You get the same thing with sodium carbonate at the same price, you total 36$. As per randy farley holmes recipe 500g of powder to make a gallon. You get 7lbs / 500g: about 6.2 gallons of liquid solution part A and B.

Depending on your bio load and stock, if you have high demand sps and mix reef, you might be dosing 1ml/gal a day each part equaly 5 mins apart that's. In my case i have a 100g tank with refugium included so i dose 100ml a day. With 6.2 gal i have 23.450ml thats like 234 days of dosing which is 7,8 months.

Now i am not sure how much you dose and how big are the kent bottles you bought. My guess they are at 500ml. With the above schedule i wil only get a month of kent dosing if not couple weeks.

All the above info i took it from randy's article, more more details check "improved diy 2 part" at reefkeeping website.
 
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