Fluval Bio CO2 Pro system.

[Calamardo Tentaculos]

Tropica CO2 System Bio

Or, you can go with Tropica and it will only set you back twenty quid.

 

[Wookii]

Tropica CO2 System Bio

Or, you can go with Tropica and it will only set you back twenty quid.

That not the same thing - the system in the OP is a pressure system - the cost comes from the pressure capable stainless steel container - though you could do it a lot cheaper using a stainless steel brewing keg that can also handle a lot more pressure and has a built in PRV.

 

[Calamardo Tentaculos]

That not the same thing - the system in the OP is a pressure system - the cost comes from the pressure capable stainless steel container - though you could do it a lot cheaper using a stainless steel brewing keg that can also handle a lot more pressure and has a built in PRV.

Wait. If it is a pressure system, does that mean they are using a bicarbonate & citric acid mix instead of the yeast & sugar method?

 

[Wookii]

Wait. If it is a pressure system, does that mean they are using a bicarbonate & citric acid mix instead of the yeast & sugar method?

I'm not sure - I think the literature suggests it might be yeast, but yeast will happily chomp through sugar and produce CO2 under pressure - pressure fermentation is a specific brewing technique.