I am just now so depressed. Had my new 36 gal aquarium for about 3 months now and it looked like it was coming along OK. Added a Green Star Polyp about 2 months ago and a Zoa about 1 month ago. Also had a Clown, 2 Pajama Cardinals, 2 Bangaii (?) Cardinals and a firefish - all doing seemingly well. I did lose 2 small clowns bought on-line about 3 weeks ago, but others looked good. Had a run of brown algae which went away, then started getting green algae. Did a few partial water changes along the way, cut back on light duration and intensity, and the chemistry numbers have been constantly good. Yesterday, I topped off with 2 gals of RODI water and then put in 3 capfuls of API Marine Stress Coat and today everything was dead - fish and soft corals. Chemistry and temp (I live in Florida) all look fine. Any guess as to what happened?