Something strange is happening in my tank. Snails are slowly dying (lost my 4th one today) and corals are showing random bleaching and tissue death with no apparent pattern. Corals that we’re doing well suddenly go downhill very quickly. Zoas that grew like weeds are closing and some even dying. I only have LPS and softies.
The only major changes are a spike in alkalinity while I was tuning my DoS (from 8.75 to 10.25 over 4 days) but that happened a few weeks ago and it’s now pretty stable. It does fluctuate from 9.5-10 and calcium from 450-500 as I have my DoS adjust based on Trident readings. I also introduced a GFO, which more or less coincides with the first issues I experienced but it’s been about a month now and my phosphate is stable.
I do a 20% water change weekly and my parameters are:
Salinity 1.025
Alk 9.5-10
Ca 450-500
Mg 1280 (working on increasing it to 1350)
Phosphate .08-.12
Nitrate 25 (could this be it? It’s a bit high but it’s been like that for the past year)
Nitrite 0
Ammonia 0
A bit over a month ago I largely neglected phosphates and they were over 1.00, then I introduced a GFO and stabilized them to .08-.12 and over a month later a bunch of corals are struggling. My current tank has been running for 2 years. Any ideas on what could be the culprit?
The only major changes are a spike in alkalinity while I was tuning my DoS (from 8.75 to 10.25 over 4 days) but that happened a few weeks ago and it’s now pretty stable. It does fluctuate from 9.5-10 and calcium from 450-500 as I have my DoS adjust based on Trident readings. I also introduced a GFO, which more or less coincides with the first issues I experienced but it’s been about a month now and my phosphate is stable.
I do a 20% water change weekly and my parameters are:
Salinity 1.025
Alk 9.5-10
Ca 450-500
Mg 1280 (working on increasing it to 1350)
Phosphate .08-.12
Nitrate 25 (could this be it? It’s a bit high but it’s been like that for the past year)
Nitrite 0
Ammonia 0
A bit over a month ago I largely neglected phosphates and they were over 1.00, then I introduced a GFO and stabilized them to .08-.12 and over a month later a bunch of corals are struggling. My current tank has been running for 2 years. Any ideas on what could be the culprit?