Choosing Co2 Bottle Size

[tanyauk]

Hello! I have fish tank which is about 200 litres (48in long) and I am using 500ml CO2 bottle for a month. I want to upgrade my CO2 system with a larger bottle, what size I should go for? I have a choice 2 kg and 3kg bottle and the price difference is 13 pounds.
How long will they last for?
Thank you

 

[voo]

Not sure how long either would last for, but maybe you should think about the size of the cylinder? Which would be easiest for you to hide away ?

 

[MoreCoffee]

Hello! I have fish tank which is about 200 litres (48in long) and I am using 500ml CO2 bottle for a month. I want to upgrade my CO2 system with a larger bottle, what size I should go for? I have a choice 2 kg and 3kg bottle and the price difference is 13 pounds.
How long will they last for?
Thank you

Well if you are using 1 x 500ml bottle per month, a 2Kg bottle holds 4 times the volume of gas so should last approx 4 times as long. Assuming that your rate of CO2 usage remains the same.

You should be able to pick up a good condition 2KG fire extinguisher for about £15 and a refill would be about another £15. (well thats what I pay)

 

[tanyauk]

[thank you for your replies, refill for 2kg bottle costs 4 pounds at local gas company, the height of bottles is the same, just width is different.