CorallineAlgae said:If you're not used to using ferts, especially on a small tank, Flourish and Excel would be the way to go. It's really hard to overdose the Seachem stuff. You'd pretty much have to try. Dry ferts are the best option if your serious about maxing out your plants and have a lot of water to treat but on a 2.5g set-up Flourish would be super safe. If you under dose or even normal dose a small bottle would give your tank a lot of mileage. You could wait until your plants are in for a while and see if they yellow and actually need it. Otherwise your root tabs could be all you need. At least for a while.
Thanks! I think ill go with root tabs and flourish at first, and change up my game plan if stuff starts to look unhappy