Have a white dot on my monti. All other sps are fine. params are as follows. Temp 80, alk 8, calc 440, ph 8.2, amm 0, trite 0, trate 0, phosphate .25.. Ran out off phosphate media doing another water change to try to fix the phosphate issue. Has not grown but just appeared out of no where. No clue what it could be.