Looks like it could be snail eggs. I recently caught my turban snails in a spawning event which lasted a few hours.
If your fish made a meal out of them, they're likely eggs of some sort.
Definitely wasn't the same ever since Dr's Foster and Smith sold it off. I'll never forget my first shipment from them of a dozen Mexican turbo snails almost 20 years ago when the arrive alive guarantee was revolutionary....
Thought this was cool...I noticed my tank had tons of tiny specs floating in the water column. Took a closer look and saw my turban snails were spawning. Usually only see males but this time it was a both a males and a female. All the fish were going after the eggs like they were candy....Was...
A few thoughts from my own experience. Maybe it helps......
1) I feed half a cube of mysis a day to my 9 fish. 2 cubes every other day sounds like a lot and is likely contributing to the phosphate issue.
2) As far as algae removal goes, pulling out the algae as a high level tactic is a good...
Any chance you can get closer pics of the corals?
Are these guys shrooms?
Cant tell from the pics.
Also 20 ppm nitrates are high, even for LPS like torches (wheras softies would do fine with 20ppm). We're the torches getting flow? Where was the placement?
Looks like you have a lot of growth in your softies from the last pics you sent! Looks like your zoas took off and toadstool got huge.
Your blasto looks pretty good too.
Slimers are generally more difficult to keep....they need a pretty good amount of light and are not gonna last with 20ppm...
Dalua Great White Skimmer for sale with some light use on it, operates like new. Selling for $275 (retails for $429). Comes with controller and power supply.
Selling for half price for any new reefers or reefers that are rebuilding from a tank catastrophe.....
Good for tanks up to 185g...