I can see what looks like cyano growing on the bleached tips. Unfortunately that one is almost certainly a goner... so don’t be surprised if it RTNs all of a sudden.
Healthy acros like those don’t bleach that quickly from not enough light in two weeks. If you blasted them with 400 par then maybe.
instead its more likely a stability and/or water quality issue. You mention your Alk, but what’s your calcium? 8.5 alk with 320 calcium for instance means dead acros. What’s your flow? Low flow and cyano is going make it very hard on new acro frags.
And while your NO3 and PO4 levels are certainly possible to keep healthy Acros, I also wouldn’t say it’s ideal conditions to learn to grow them in either. High nutrients can be a double edged sword, especially when the tank doesn’t yet have a lot of growth and stability... it’s going to exacerbate issues.
Assuming you get your Alkalinity and Calcium nice and stable, 8.0, 420. Then make sure you get strong flow, I’d get those nutrients more in the 1-2ppm NO3 range and 0.03-0.05 PO4 range.
Once you can grow them, then you can try boosting the nutrients if are having color or slow growth issues.
Also never hurts to do an ICP test to check for other water quality issues.
Healthy acros like those don’t bleach that quickly from not enough light in two weeks. If you blasted them with 400 par then maybe.
instead its more likely a stability and/or water quality issue. You mention your Alk, but what’s your calcium? 8.5 alk with 320 calcium for instance means dead acros. What’s your flow? Low flow and cyano is going make it very hard on new acro frags.
And while your NO3 and PO4 levels are certainly possible to keep healthy Acros, I also wouldn’t say it’s ideal conditions to learn to grow them in either. High nutrients can be a double edged sword, especially when the tank doesn’t yet have a lot of growth and stability... it’s going to exacerbate issues.
Assuming you get your Alkalinity and Calcium nice and stable, 8.0, 420. Then make sure you get strong flow, I’d get those nutrients more in the 1-2ppm NO3 range and 0.03-0.05 PO4 range.
Once you can grow them, then you can try boosting the nutrients if are having color or slow growth issues.
Also never hurts to do an ICP test to check for other water quality issues.