These interesting specimens came via CO2Art, spotted them in the plant list, never seen them before, didn't know anything about them so bought three! Stuck 2 in the main tank and one in the walled tank, came back a couple of minutes later and the shrimps were literally going bananas over Bananas (Nymphoides Aquatica).
The one in the Anubia walled tank looks like a Christmas tree!
I wasn't really after more plants, impulse buy whilst shopping for these beauties!
Took both of them immediately down the road to get them filled up, £10 each, nearly a kilo of gas per cylinder after filling (dry weight 1.17kg, 2.1kg filled). Lost the yellow plastic nozzle safety caps that came with them when I picked them back up after being filled, noticed they'd replaced them with nice screw on metal ones, bonus!
For curiosities sake this is what the nozzle looks like with the safety cap off.
2kg capacity cylinders would have been more preferable but I couldn't find any, these are nice and shiny though! On the plus side at least I've halved my gas bill compared to using sodastream and those nice valves take the scare factor and urgency out of a bottle change when compared to changing a soda stream one (old co2art adapter no valve).