Not sure on the cider and carbonation, but some insight on a small regulator.. I bought [this](ultimate co2 regulator works with 5 types of co2 tanks (0-25psi) https://www.amazon.com/dp/B071ZNP5BS/ref=cm_sw_r_cp_apa_i_BEbCDbWE3WF68) Along with [this](new qiimii mini ball valve npt fxm thread with stainless handle ss304 pn63 (1/8") https://www.amazon.com/dp/B01MTWF0B4/ref=cm_sw_r_cp_apa_i_8FbCDbS8HF4PZ) ball valve (optional) so I can shut off the flow if I need. I also got a soda stream co2 cartridge from my local target. This is a great small co2 setup that I use for my mobile keg set-up.