Article: DIY Calcium Reactor

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Article: DIY Calcium Reactor

OdgovorNapisal/-a Bojan dne 16 jan 2005 21:52

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More informations can be found on the following page

http://www.sloreef.com/bojan/CaReactor.htm

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Bojan
 
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OdgovorNapisal/-a Cassio dne 19 dec 2005 13:26

Hello Bojan !

I made a Calcium Reactor based on your project.
It is quite similar. There are only one difference:
I rotate the pump 90 degree.
It sucks water and CO2 from the top and injects to button of the reactor.
The CO2 goes up passing by the media.
It was working very well but for 1 week.
I had problems with my pump.
I'm using a Brazilian brand (Better 520) with 520 lts per hour of capacity.
The problem was that the pump stops.
I forgot the valve used at the recirculation CO2 loop and CO2 was injected from the pump to the bottom of the reactor chamber but too injected at the top of the chamber.
With this second injection, the top of the chamber became with gas instead fully with water and the pump runs with part out of water.
Now I installed a flow control valve and this problem will be solved I guess.
My question is: The capacity of the pump is important in the reactor ?
The reactor is pressurized. This pressurization can damage the pump ?
Better 520 is weeker than MaxiJet 1000 used in your project.

Thakns in advance !


Cássio
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OdgovorNapisal/-a Clownfish dne 19 dec 2005 15:41

Hello Cássio!

Can you tell us why do you change flow direction in your reactor project?
If you use flow as you wrote your Ca Co2 reactor really run only if quantity of CO2 is low and CO2 doesn't collect in the upper part of reactor.

As Bojan (and few of us here ) made DIY reactor we try to make it better and of course more independant of CO2 level in reactor.
If you use pump to pull water from bottom of reactor pump will work and pump water even if pump is almost out of the water.

Therefore flow sw is not essential in our case.

If quantity of co2 bubbles, flow thrue reactor is right and recirculation valve in backup loop is in right position that kind of recator could work withouth any additional care for months..


Cassio Napisal/-a:My question is: The capacity of the pump is important in the reactor ?


I think power and flow produced by the pump had to be proportional to volume of reactor and volume of the tank..

As Bojan uses main tank of approx 500L MaxiJet 1000 is quite good choice..

I have simmilar tank(600L) and reactor(with external MaxiJet MJ750) pump and Reactor works excelent..

Better pump means higher flow thrue media and this is simmilar as if you increase volume of media..

Cassio Napisal/-a: This pressurization can damage the pump ?
Better 520 is weeker than MaxiJet 1000 used in your project.


Pressurization can not damage pump!

However on the market there is a lot of cheap pumps which are ranged from 400-600L/h but in reallity when you use that kind of cheap pump and use it in the external filter or CaCo2 reactor flow drops down significant to less than 100L/h..

MAxiJet pumps are cheap and quite strong and you could saw them in many DIY projects as also in DIY CaCO2 reactors..
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Clownfish
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OdgovorNapisal/-a Cassio dne 19 dec 2005 17:36

Hello Clownfish !

I sent to your e-mail address my project.
I believe that my explanation was not so good.
Maybe with my project you will understand better.
My tank is approx 160L (nano) and my reactor pump is 520L.
I use my main pump (used for main circulation of the tank) to send water to reactor. Once it is pressurized, the water comes back to main tank without another pump.
To tell you the thuth, I don't know why we need to use a pump in reactors.
Now I using two pumps: one to flow water from tank to reactor and back (this pump is at the Back Sump - Back to the Tank and another one inside reactor).
Tks !

Cássio
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OdgovorNapisal/-a Clownfish dne 19 dec 2005 17:58

Hello cassio!

I have seen your pic and even without pic I know what do you mean..
Why do not you try to rotate pump in reactor as I try to suggest you?
That upper green One way valve... Why do you use it..?
I use valve with regulation of Flow thru bypass tube..
And set this valve to position where your reactor is full of water..
In your case with pump which soak water and co2 from the top of reactor
in case when co2 bubbles rate are too high those bubbles form a
place without water in top on reactor and when level of Co2 reach pump
your pump stop working. And as you pump CO2 at the bottom of
reactor co2 bubbles goes thrue material and flow to the top of reactor
and no the way pump soaks them in the pump and again at the bottom..

If you rotate pump it is hard that bubbles of Co2 will reach bottom of reactor..

Anyway what is your Co2 bubbles rate at bubble counter?

My is about 1bubble/sec or little more.. and you had to wait few hours until ph in reactor reach 6.3...if at this ph level Co2 is still collecting at the top of reactor and pump can not dissolve into water you should increase water flow thru reactor or decrease CO2 bubble rate...

Also if you will change pump-water direction you will see that turbulences in output flow of water at the top of reactor will course additional dissolving of co2 at the top of reactor..

Anyway.. 160L nano tank is really huge?

If you have your aquarium and/or sump in same level as your reactor it is no need for additional pump for water flow thru reactor becouse water will circulate by pump in reactor.. Of course you should put a valve on those circulating tubes to set water flow.. Still the output tube should be connected at outflow side of pump in reactor..
Of course you could use reactor withouth pump in it, but then your media volume and reactor volume by themself should be much bigger as it is now with pump..

Regards!
Zadnjič spremenil Clownfish, dne 19 dec 2005 18:00, skupaj popravljeno 1 krat.
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Clownfish
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OdgovorNapisal/-a Bojan dne 19 dec 2005 18:00

Cassio Napisal/-a:To tell you the thuth, I don't know why we need to use a pump in reactors.
Pump inside reactor is very important, because it is used for internal circulation in the Ca reactor. Circulation inside of the ractor have to be at least 100 higher than flow between aquarium (sump) and Ca ractor. Water have to pass media inside reactor 100 times or more before it is pumped out of Ca reactor.

I have internal circulation in the reactor 1000l/h, but flow between Ca reactor and sump is only 3l/h, so water pass media in the reactor 330 times before it is pumped out of Ca reactor.
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Bojan
 
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OdgovorNapisal/-a Bojan dne 19 dec 2005 18:02

Cassio, welcome to our forum.
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Bojan
 
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Re: Article: DIY Calcium Reactor

OdgovorNapisal/-a adlena dne 02 sep 2013 10:33

:) hvala za delitev
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