I recently got the Nutrafin CO2 injector for my plant tank and I just set it up last night. I followed all the instructions carefully (or so I thought) but its been 24 hours now and still no bubbles! Any thoughts/ideas? I really want this thing to work!

I would check all of the tubing and connections for any leaks. Even the tiniest leak will prevent the CO2 from bubbling.

If the room is cold, it may take longer to get started. But ifyou don't see anything sometime the 2nd day, something is probably wrong.