Cloudy water - what the heck happened?

[houstonhobby]

Yesterday morning I woke up and my 90 gallon tank (110 gallons overall) was cloudy as anything. No measurable ammonia, nitrite, nitrate, just cloudy.

This happened to me once before when I had a bunch of macro-algae go sexual, but nothing like that happened (turns out I'm not too good with macro-algae anyway, but my Hawaiian Blue Tang really enjoys it, so not a lot of macro-algae is left in there).

All inhabitants accounted for (4 clownfish, 3 anemones (bought 2, 1 split), 5 chromis, the aforementioned tang, a goby that likes to eat sand, couple of skunk cleaners, 3 peppermint shrimp, assorted crabs, hermit and otherwise, and snails. Oh, lots of snails. Big and small.

Coral? One small piece of some sort of zoa I got for free from ReefsToGo. Has grown a lot. I do plan to have coral at some point.

I ramped the skimmer up to max (skimmed about 7 gallons thru this morning), changed all the filter materials (adding water polishing to the mix), and changed probably 20 gallons of water.

Tank was much better by mid-day, is perfect this morning, and nothing bad happened to any of the inhabitants. But I just wondered . . . what the heck just happened?

Thanks,
Rod

[oscarinw]

Could be spawn of some kind. Turbo snails can do that and it gets messy but it poses no risk. It's a guess but could be.
I wouldn't worry about it much though

[houstonhobby]

Makes sense because I have an uncountable number of turbo snails. I bought turbos and nerites, got some others (including some with not much of a shell, almost like slugs with a little beanie) as ride-alongs, but the nerites don't seem to be doing that well holding their population numbers while the turbos seem to be growing both in size and numbers.

I have a lot of little white things on walls and rock. Single snail eggs I think. Are those nerites?