A lot of shrimp keepers won't use liquid carbon with their shrimp. Some only use it half strength. Some on another forum I frequent say their female shrimp were only berried once they quit using it. (They were talking specifically about Neocaridinia shrimp.)
Liquid carbon is a reducing agent, but it's not CO2. The active ingredient is Glutaraldehyde. Any reducing agent has the potential to reduce available oxygen in the tank. I'd be particularly concerned about the use of liquid carbon in a bowl with no surface agitation.
I've just read too many posts from people talking about shrimp colonies wiped out, and fish gasping at the surface to use it. All my tanks are very low tech - I dose Flourish Comprehensive, API Leaf Zone and use root tabs for my crypts, vals and swords, but I don't use liquid carbon. My plants are doing fine.