my wife loves the flame hawkfish as well, lots of personality. And we feed the tank 5 times a day, they are happy fish.
But the wife and I hit a bit of a horror, and a hard learning lesson.
On the 7th when doing the weekend testing we noticed something. The Nitrates were in 20s (not to worried), but our Phosphates were .850. So we set out for a solution to bring down the phosphates. I have Rowaphos in my 30, and it works well. Does the job has advertised. It sits in a pouch in the last chamber of the filter stack. The 90 doesn't have a filter stack, so while at my LFS I spotted the IceCap media reactor and decided to give it a try. Wife and I set it up and got into a bit of an argument over the Rowaphos. As the instructions state do NOT rinse, Icecap says it is optional, and the internet says all GFO should be rinsed thoroughly. So we settled and rinsed the Rowaphos with RODI water until it was fairly clean, not 100%. I put 250ml in the reactor, turned it on and set it to what I thought was a decent setting. It was rolling about ok.
Within 5 minutes the tank became cloudy white, and the skimmer was going nuts. I could not empty the skimmer fast enough. I turned the reactor down to it's lowest setting, a gentle bubbling basically. My skimmer calmed down to it's normal activity. But I started to get worried, at first the skimmer cup was pure red water.... then it turned greenish... then back to the normally yellowish color. I have a reefmat 500 (thank you early BD present!) and it was burning through mat fast for about 2 hours. Everything calmed, the skimmer was acting normal... all looked good.
Next morning..... the pink streaked wrasse was dead
By the evening the death toll rose and we lost our Mandarin, and blenny
day two yield more death. one of the pajam cardnals, and our flameback angel perished. Also on day 2 the phosphates are down to .3
day three the Fairy Wrasse and the Royal Gramma are acting sick, scratching up against rocks. All the other fish, nems, and corals are acting normal no signs of stress.
Day three 10% water change ( it was all the water I had at the time)
Day 4 wife starts feeding the fish garlic with their food.
Day 5 the Fairy Wrasse and Royal Gramma are starting to scratch less, and are eating normally, other fish are looking good
This weekend we will be changing out 30 gallons of water.
To say the least.... this was devistating, and a harsh leason.