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Which Co2 Set Up?

Callum

Callum

Member
Joined
30 Nov 2011
Messages
299
Location
Bristol
So i have a couple of ideas for setting up Co2 in my 25l tank.

Here are the two plans: (excuse my paint "skills" :lol: 😳 )

6505931207_28eca60d73.jpg
whichco2 by callum fish, on Flickr

As it's a 25L tank plan b would look quite ugly since there woul be a filter taking up a large amount of the tank.
Plan A total cost: £46.69
Plan B total cost: £14.28

So which one should i go for?
 
Will it work better in general?
 
Might I add that the filter in plan A will turn over 150L/H and the internal filter in plan be will turnover 200L/H
 
No one else can help? 🙁
 
Plan A should dissolve your CO2 much better than Plan B and, as you mention, the fact that the kit is external gives you more room in the tank. If you have the money it would be Plan B for me. If you could get a filter that got closer to 250LPH then even better.
 
davem said:
Plan A should dissolve your CO2 much better than Plan B and, as you mention, the fact that the kit is external gives you more room in the tank. If you have the money it would be Plan B for me. If you could get a filter that got closer to 250LPH then even better.
Click to expand...
That would be ideal but i cannot find any 250L/H external filters 🙁
 
go with plan a if you have the cash mate.you can get a filter rated a lot high if you want. most filters have a means to reduce the flow, if not you can fit your own method just an in line tap on the out flow
.
 
How big is the cylinder you'd be using? If it were me I'd go with whichever is cheaper, as unless you're planning to use those tiny co2 cylinders, then a cylinder (600g and bigger) will last you yonks on a 25lt so you'll bearly notice the difference if one system is slightly better at diffusion than the other.

I'll add that on a 25lt tank, make sure the needle value is a good one, I tried using my disposalbe co2 kit on a 30lt and I couldn't get the very very fine adjustment of the co2 rate that I needed, so was either to low or gassing the fish.

Sam
 
danmil3s said:
go with plan a if you have the cash mate.you can get a filter rated a lot high if you want. most filters have a means to reduce the flow, if not you can fit your own method just an in line tap on the out flow
.
Click to expand...
What do you mean by an in line tap on the outflow?
 
How much better would plan A be better than plan B? Just slightly or a lot better?
 
Plan A is good.

Plan B. I've tried this, was the first pressurised injection method I tried. You have to keep fiddling with diffuser position and watch co2 bubbles rise past filter inlets and vent off to atmosphere.

Plan C is also viable and sometimes used when multiple filters are used. The filter circulating the co2 would run with less or even no media and serve only as a co2 reactor. I've not done plan c myself.

Currently I only use plan A on my 125l that is linked in my sig. If your on a budget, the tank is small so go for plan b. If you want spend a little more and get better flow and distribution with less headaches, less gear in the tank (which helps in small tanks) and having smoother maintenance then plan A is what you want.
 
Given that many ppople just have the diffucer in the corner of the tank and get good diffusion anyway, I doubt you'll notice the difference between the various options.

You could also just push the end of the co2 tubing into the fitler intake and the bubbles would get sucked in that way. Would avoid the need for a diffuser all together.

Have you also considered inline differsers, these are very good.

http://www.ebay.co.uk/itm/CO2-Carbon-Di ... 19cbcfb014

Cant say Ive used that filter specifcailly, but the cheapo ones are all a much of a muchness these days. The main difference I have found is that the cheaper ones tend to be more noisy.

Sam
 
Been reading over your comments a couple of times and they have been a great help, thanks! Will see how much money I've got after Christmas and take it from there 🙂
 
Going for plan A.
 
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