can you have to much? i have zero p04 and n03 yet my cheato still grows at a fair rate, i have a 5x2x2 display tank with a 48x18x20 sump which is nearly all rammed with cheato, if the p04 and n03 is undetectable, what else will the cheato remove from the water, i'm having a few probs with some sps being very soft and stn at the base's, all major params check out good, so am thinking about maybe the minor trace elements may be too depleted? what do you guys think?