Yes that means 30 watts. You may or may not have algae issues with more lighting...confused as to why its unsafe to use your 25w? Its really kinda complex, but I think your lighting should be fine! If your plants aren't growing, then try for a different kind of lighting but I would probably just see how it goes for now!
10 hours should be a good amount of time. Those plants are pretty easy going, so I think it will be fine. BTW, I wouldn't suggest the CO2 fizz tabs...they give really unreliable dosing and most planted tank aquarists agree that its a waste of money. I think the root tabs were a great investment however!
A great website is aquariumadvice.com. Just look through or post questions in their FW planted forum. I'm a member there too!