How are you getting that CO2 into the the tank?
How big is the tank?
Surface agitation/oxygen via air pump?
co2 via pressurized, ph-controlled, Reactor 1000
tank is 86Gallon
surface agitaion minimal, only spraybar. no oxygen..
Even still a 500g (little over a pound) bottle should last about 2 months.
that's what i figured....
I don't know what the market is like for re-fillable tanks in Denmark, but I wouldn't doubt there is somewhere that you can lease/rent a 2000kg (Close to 5lb) because I did see the prices, and $110 euros (DKK still around 7.5 on fx market?) is a bit steep. But IIRC, CO2 pollution taxes there are a bit high as well...
I can lease one somewhere im sure, but lfs' are rather expensive...¤%¤#%#
You may have a look here:
and see if any of them can sell/lease on small tanks.
1 actual welding company came up..rest was names only.. welding=svejse in Danish! =)
It depends on why you want to lower your pH. Plants will benefit from the CO2, if you don't have plants, lowering pH is handled a bit differently.