CO2 tank

**k3nlim** · 3rd Jun 2009, 15:43

I'm keen to embark on a high tech tank after having a low tech one for a year. What do we look out for in a CO2 tank? Is there any differences between the green or black tank? Will all solenoid fits 2L,3L or 5L?

Sorry for the newbie questions.

**BFG** · 3rd Jun 2009, 16:29

Hi K3nlim.

The black and green are all the same to me but there is another one that some have problems after they refill the tank. Where possible, get the ones withe the 2 tone color, grey and black. NA are using these to change on a 1 on 1 basis. For solenoid, it should fit all capacity of tanks.

Hope this helps!

**k3nlim** · 3rd Jun 2009, 16:48

Thanks BFG! I'm looking at refilling at industrial area (i'm near to one) thus the question on different colours and i understand only certain grade or model are allow to be refilled due to certain safety regulations.

**tawauboy** · 3rd Jun 2009, 20:30

the regulators use standard cga320 fittings designed for co2 related equipment. so the fitting is independent of the cylinder capacity.

normally industrial refillers do check whether your cylinder has been certified as safe for use. otherwise you can check whether they offer the service of submitting your cylinder for a hydrostatic test. after a successful test, the test date is stamped on or near the neck of the cylinder.

**k3nlim** · 4th Jun 2009, 16:51

thanks tawauboy for the informations!! I will keep a look out for the tank that meets the required specifications.

**blue33** · 4th Jun 2009, 17:14

Correct me if i'm wrong. CO2 is those editable CO2, not those industrial CO2.

**tawauboy** · 4th Jun 2009, 20:15

it is known as food grade co2.
industrial grade co2 has slightly lower purity level.
generally, food grade co2 is used in aquaria.

**k3nlim** · 5th Jun 2009, 00:47

May be side track abit..how do we know the CO2 refill that we got from LFS are of food grade co2? From business point of view (assuming lesser cost due to numbers of tanks),it makes sense to refill them in industrial area, in this case, provide a slightly lower purity level.

Are we paying for what we're getting? Just a thought...