+1,000,000grouper therapy;702040 wrote: The reason the phosphates are not showing up is because the algae is using it up.
Try testing your phates in the AM before the lights turn on. Have you thought about biopellets?
You clearly have a big nutrient problem. I bought a frag that had some HA on it. I scrubbed as much off as I could, but it was in between some dead branches at the base of the colony. Within a week in my tank, the HA withered and died. No nutrients equals no algae....