Hi. I’m in the early stages of my first aquascape and, mainly for budgetary reasons, planned to introduce CO2 some time in the future. After reading several threads about the potential adverse effects on livestock by the introduction of CO2 at a later date I’ve decided to get CO2 from the get go. What I’d like some feedback on is if introducing CO2 to a stocked tank may be problematic then surely the same applies when introducing newly purchased fish to a CO2 injected tank if they haven’t been used to that? Apologies if I’m missing something really basic here.