CO2 cylnder gets empty very quick

[LMuhlen]

Going back to this thread. I have an opportunity to upgrade my CO2 reactor. The current setups uses separate pump for reactor and water outflow stays next to the main return pump.
Now we have a guy in the NL who makes nice co2 reactor. He offers me double reactor with bypass which will be installed right after the main pump. The price is around 250 euros.
So I have the following questions:
1) Do you think it is a good upgrade?
2) How much it will affect flow?
3) Will it affect CO2 effectivness?

Thank you in advance

I don't see anything wrong with your reactor setup, with it staying in the sump and releasing CO2 rich water near the sump's pump. So I don't see what could be improved other than reducing one pump in your setup. If the extra pump is your concern, then go for it. There will be a reduction in flow, but I don't know if it is meaningful or not.