The tank is only a couple of months old. I had a dry rock and sand start. This is my third tank, first dry start and first encounter with Dino. I am Testing 0 Nitrate which I think is the cause. So far I've just reduced the light time and intensity to half to hopefully keep it slightly contained. I've got SpongeXecel on the way to start dosing Nitrate, a bunch of copepods and phyoplankton, as well as way to dose phos. I also got some Dino X as a last resort. The growth is on most surfaces but esp. on the upper back glass. They are stringy and slimy. This sample was taken from the back glass. They haven't been present long so I'm hoping to act quickly but I can't tell if they are Amphidinium, Prorocentrum, or something else. I added cheato to the fuge the day before I decided it wasn't diatoms and I'm not sure if that's good or bad. It's good algae, but if my problem is low nutrients the it maybe counter productive. I am slowly upping my feeding. Corals, fish and snails are fine, but the snails maybe sluggish. Any advice is welcome.