Long time no post. Basically, I'm fighting dinos since last summer. Now I can see some light at the end of the tunnel. A quick recap: I had 0,0 nitrates and phosphates for about 2-3 months, due to a lot of various types of algae. Silly me, I thought the ecosystem would sort itself out. It didn't, but dinos appeared. A brown, slimy layer on the sand, with long, sticky threads waving on the algae. The Trochus snails and the Turbo snails died first. Then most of the algae... Then some corals (the sinularia, for example). Once, returning from a holiday, it started to look better. Then I did water changes, and the dinos returned. What seemed to help is to bring the nutrient levels up (first by dosing, later by feeding more), decreasing the illumination (both the intensity and the duration, and blues only), adding phyto and bacteria, and stopping any cleaning (including the glass). Also, time to time, blowing everything with a turkey blaster and afterwards running a filter stuffed with filter wool seemed to be beneficial too (remember, this is a filterness tank by default). Running UV didn't seem to matter. The clownfish and the mushrooms are fine, other corals suffered. Now I'm beginning to think about increasing the light (and adding some whites), and getting some Trochus snails. Hope for the best....