Recently lowered my No3 down to around 1 over a period of a few weeks, from around 30+, and po4 from 0.12 to 0.08 tank is mainly LPS. I have done this using NOPOX, however recently I’ve started getting diatoms in certain areas that just won’t go away. I’m sucking up with a turkey baster as soon as it appears but what could be causing it ? Equipment in tank seems to get a brown dusting too, not visible on glass (although cleaned regularly) but surface skimmers and wave makers get brown within a day or two of cleaning.
Chemistry as follows;
Calc : 500
Is the po4 and no3 out of balance ? As I didn’t get this when N03 was elevated (but did get GHA)
Recently also replaced TMC illuminair lighting to a pair of Radion G2, slowly acclimated to 35% overall intensity. But I believe diatoms have appeared as a result of lowering N03.
Any advise would be greatly appreciated- all inhabitants seem perfectly fine