I planted some HC. This is my second full day with my DIY CO2 running. Several of my plants are streaming a bit. I've only ever seen a little streaming right after a water change in the past. It's not pearling but it's still a good sign. Both my compact amazon sword and ruffle sword and grew a new leaves today. Several of my corys and one of my mystery snails explored the CO2 diffuser. I have to assume that they know what they are doing.