This is a less confusing repeat of the question I asked in the equipment section ...'Free DIY CO2 regulator'. Sorry it wasn't meant to be click bait, people only read the FREE bit I think and I didn't get any replies apart from "where the free regulator" 
I always thought it was impossible (or perhaps just reckless) to turn a yeast CO2 system off at night because they can explode, but I woke up to gasping fish a few weeks ago and I suspect the CO2 level has risen too high by morning so leaving them on 24/7 is dangerous as well.
I have seen a post on another forum where a guy has proposed a DIY pressure regulator that stores the excess CO2 and so it can be turned off and it also solves the problem of uneven CO2 production rates.
It seems like a good idea but I would like to know if anyone here has ever seen a system like it or better still tried it ..... its very nearly free
Please can you have a look at :
Pressure Regulating A DIY CO2 System | Think Fish Tropical Aquarium Forum
and let me know what you think.
I always thought it was impossible (or perhaps just reckless) to turn a yeast CO2 system off at night because they can explode, but I woke up to gasping fish a few weeks ago and I suspect the CO2 level has risen too high by morning so leaving them on 24/7 is dangerous as well.
I have seen a post on another forum where a guy has proposed a DIY pressure regulator that stores the excess CO2 and so it can be turned off and it also solves the problem of uneven CO2 production rates.
It seems like a good idea but I would like to know if anyone here has ever seen a system like it or better still tried it ..... its very nearly free
Please can you have a look at :
Pressure Regulating A DIY CO2 System | Think Fish Tropical Aquarium Forum
and let me know what you think.