Hello R2R family,
I bought a colony of grape juice off a fellow reefer about a week ago & it seemed to be fine in the DT for the last 5 days. The first three days it was a very bright green color but no PE and the fourth & 5th days it seemed to be browning out a bit but the polyps were actually fully extended. I did some research on the topic and most people were saying it was from excess nutrients in the system or too little light. I run a 250w metal halide in 14k & I tend to keep my water very clean, so I ruled that aspect from the equation. Parameters have been relatively stable since I added the colony. I feed very heavily a mix of frozen mysis and pellets twice a day & export just as heavily. I’ve been testing the big three daily since I added it to get a grasp on its consumption but my question is can a small water change ( 5g ) alter my parameters enough to cause STN on the colony ? I first noticed the necrosis last night but it only seemed to be on the underside of heavily shaded branches, so I figured it was a natural event. Fast forward to this morning and I could see the flesh melting off in some areas. The only other change I made to the system was the addition of ROX 0.8 carbon in a media bag. This one has me stumped did I just get unlucky ? Is it time to frag it up or should I just leave it be and hope for a comeback ?
Day 1 in tank :
This Morning :
I bought a colony of grape juice off a fellow reefer about a week ago & it seemed to be fine in the DT for the last 5 days. The first three days it was a very bright green color but no PE and the fourth & 5th days it seemed to be browning out a bit but the polyps were actually fully extended. I did some research on the topic and most people were saying it was from excess nutrients in the system or too little light. I run a 250w metal halide in 14k & I tend to keep my water very clean, so I ruled that aspect from the equation. Parameters have been relatively stable since I added the colony. I feed very heavily a mix of frozen mysis and pellets twice a day & export just as heavily. I’ve been testing the big three daily since I added it to get a grasp on its consumption but my question is can a small water change ( 5g ) alter my parameters enough to cause STN on the colony ? I first noticed the necrosis last night but it only seemed to be on the underside of heavily shaded branches, so I figured it was a natural event. Fast forward to this morning and I could see the flesh melting off in some areas. The only other change I made to the system was the addition of ROX 0.8 carbon in a media bag. This one has me stumped did I just get unlucky ? Is it time to frag it up or should I just leave it be and hope for a comeback ?
Day 1 in tank :
This Morning :