I am finally getting close to planting my new bog that will filter my brand new pond. Since I am starting from scratch, there won't be fish when I put in plants - so no nutrients from fish poo. Can I still go ahead and rinse off the dirt and plant directly into the gravel? I'm sure the plants won't really thrive for a while - but will they survive? Or should I just sit the potted plants directly into the gravel until I have fish to help fertilize?