Dennerle Co2

[backtotropical]

Anyone used it? Click here to see it.

I have a Carbo Plus system in my tank at the minute, and to be honest, its crap.

I know, you guys told me. I should have listened.

Anyway, reviews please?

 

[Themuleous]

Those kits are good, and the gas is cheap on ebay. You can probably get an adaptor to change from disposable cylinders to refillable should you wish to at some stage.

Sam

 

[backtotropical]

Cheers Sam.

I wonder if anyone on here uses or has used it?

 

[backtotropical]

I've been quoted £110 for the kit which does up to 300litres + £80 for the solenoid. Is that a good price?

 

[SuperColey1]

£110 doesn't sound bad if its got all you need in it but £80 for a solenoid!! WOW.

Andy

 

[Themuleous]

You could DIY a kit for £80, hell give me £110 and I'll build you a kit that includes a solenoid!

BTW which kit is that? Be very wary of quoted tank sizes for CO2 kits. They dont count on you needing nearly as much CO2 as you actually do. The hydor system says for tanks up to 300lt but I doubt it'll get anywhere near the 30ppm required. and the 74g cylinder would last around a day on anything over 10G.

Sam

 

[backtotropical]

Hi,

It's the kit which is rated for 300 litres in the link above. They go on about needing 20 - 30ppm of CO2, so i think it should be alright.

The kit includes gas cylinder, pressure reducer with needle valve, check valve, ladder diffuser and CO2 level testing kit.

No bubble counter though, do i need one? Does this sound like everything i would need?

I won't buy the solenoid. I was thinking about running CO2 24/7 with an extra powerhead running during the night for surface agitation. What do you think?

I just don't think i'd be happy with a DIY fire extinguisher kit. Sounds dodgy to me!

Cheers

BTT

 

[backtotropical]

Also, is a bubble counter necessary? The kit doesn't include one.

Sorry to show my ignorance, i've never used pressurised CO2 before.

Cheers and Merry Xmas

Backtotropical

 

[backtotropical]

I got a reply about the bubble counter on UKAPS (Thanks Mr Farmer). I think i'm going to buy it (without the solenoid) in the morning.

 

[SuperColey1]

As long as you slowly let the CO2 build up then over the first few days you should slowly reach your 30ppm and then stay there. As long as the CO2 is at 30ppm when the photoperiod begins it should be stable enough for the plants to use up some and then let it build up again at night.

what I mean is if it were to stay at 30ppm throughout the photoperiod then it would get to dangerous levels at night so you should be aiming for a limeade coloured drop checker in the morning and it should reach a darker green by the end of your photoperios before starting to beginning to build up again.

Bubble counters are always useful even with a drop checker. Remember the drop checker will be an hour or 2 behind the tank. It is there for an easy check on your levels.

The bubble counter once you get used to it will tell you instantly if something is wrong. After you've set it up and got used to it you will know what bps your setup needs and will find that you can recognise from the bubble count if it is suddenly going faster or slower etc. which then tells you something is wrong.

Andy

 

[backtotropical]

Thanks again Andy, i don't know if i would have thought about building up the CO2 over a period of time.

Your advice and guidance is invaluable. Cheers mate.

I'll let you know how it goes.

BTT

 

[hwoarangtag]

Is the stated pressure reducer a kind of co2 regulator; as a rule of thumb, i read that we should set the regulator to 20 psi for X reasons. From the picture i dont know if that "pressure reducer" can give you that possibility to set to a certain psi. Hence, the only way to check if you have the right amount of co2 is of the aid of mesuring the ppm?

 

[SuperColey1]

The pressure reducer is the regulator. This in no way determines the output that you are giving to the tank as you are using it more as a on/off valve. The pack says there is a needle valve which is what you use to determine how much of the gas that the regulator is letting through can get down the line at any one time.

Not sure about PSI as we use a Bar measurement. We keep ours between 1.5 and 2 bar then use the needle valve to fine tune the bps. 1bps is a good starting point then we increase/decrease as the dropchecker/fish gasping tell us to.

Measuring the ppm is always the only way of seing if you have the right level of ppm. A regulator psi/bar reading or bubble counter can never tell you the ppm. It is just a visual guide for you to see your output levels from the cylinder and into the tank. The drop checker (or other methods) are the only way of checking the ppm that is staying in the water.

Andy

 

[backtotropical]