I have set up a nice little 5 gallon tank in my office. I have brought some plants in: java fern on a small piece of driftwood, a small red wendti crypt, dwarf sag and some fontainalis. I put a couple of trumpet snails in..it looks nice. BUT..I have no fishs yet. What do I need to add for the plants to keep them healthy until the fish are added? I have flourish excel to add, also fluorish, I mean I have the usual plant stuff, but is that enough to keep them going?