I meet a severe RTN event in my tank, the RTN started a week ago and keep going worse. I lost one to two SPS each day. Almost tank crash now, even one clam looks dying. I had this kind of RTN event before but usually it would recover after few days, but this time it has no sign of recovering.
See what might be the cause of the RTN?
Before RTN:
. I had a water change with near exhausted DI unit. means TDS=1, it was TDS=0 for fresh DI unit.
.I adjusted CO2 level for Ca reactor. KH goes from 8.7 to 9.2.
During RTN:
.changed GAC and GFO media.
.removed a lot of sand for SSB.
.Added copper resin, but it didn't seem help.
See what might be the cause of the RTN?
Before RTN:
. I had a water change with near exhausted DI unit. means TDS=1, it was TDS=0 for fresh DI unit.
.I adjusted CO2 level for Ca reactor. KH goes from 8.7 to 9.2.
During RTN:
.changed GAC and GFO media.
.removed a lot of sand for SSB.
.Added copper resin, but it didn't seem help.