How much is too much?
How much phosphate in the water is too much? I have a 10gal, moderately planted tank, 2.5 wpg of cf at 6500K, no CO2, no fertilizing yet pH 7, relatively soft water. The tank is a month old and not completely through the fishy cycle, i.e. minimal nitrates yet. I have 3 small glass tetras who seem to be thriving. I have had NO cloudy water or algae blooms. (sshh!, don't spread it around). My AP kit is reading 2, which is roughly the level of phosphate in my tap.