The creek is dry for the most part and I really do not trust the stagnant pools. If it were running I would be less leary, so the rocks are currently a no go. I am going to put in the alternative filter to my AC and I have stopped adding the ammo lock, so we shall see. And Mike, I only recently went back to adding the ammo lock, after my nitrites had disappeared but the ammonia remained. I am trying to use it as a kind of last resort! Originally I had added it before I knew that those things were to be a last resort kind of deal
Thanks so much for your help