Is it possible to have 0 phos and high silica? Less than a month ago I had 0 on each but I am quessing my phos remover did what it was not suppose to do, release back into the water. Now my Phos still level 0 but my silica is blue which is not even a color on the scale which is yellows and greens. I did a water change and replaced the remover, but what I do have (Tropic Marin) does not state it removes silica only says phosphate removal. Do all phosphate remover also remove silica?