240 gal system. Tank is 6 months old. For first 4 months all SPS was doing fantastic especially acros. Showed great polyp extension, growth etc. Since then Ive seen slow die off of most acros and a couple Monti caps. All fish, LPS, etc. are doing great. My lighting hasn't changed. I see no signs of pests. My water parameters have been stable. Run Apex and monitor closely. Test dKH, N03, P04 separately 1-2 times a week.
1.025
PH - 8.2 - 8.4
Temp 78
Alk 8.6
Ca 423
Mg 1272
N03 usually 5-10
Hanna - P04 usually around .02 (occasionally drops to 0)
Hanna dKH confrims Apex.
I dose AB+ and 2 part, Run UV, AWC of 3 gallons per day (1.3%).
Can slightly low Strontium or Iodine be the problem? example Photo of an acro (w/o lights on) below - this was thriving just a couple months ago.
Any thoughts on what to try next would be greatly appreciated!!
1.025
PH - 8.2 - 8.4
Temp 78
Alk 8.6
Ca 423
Mg 1272
N03 usually 5-10
Hanna - P04 usually around .02 (occasionally drops to 0)
Hanna dKH confrims Apex.
I dose AB+ and 2 part, Run UV, AWC of 3 gallons per day (1.3%).
Can slightly low Strontium or Iodine be the problem? example Photo of an acro (w/o lights on) below - this was thriving just a couple months ago.
Any thoughts on what to try next would be greatly appreciated!!