Algae Scrubber Disaster

[Zoaelite]

Although a very long shot technically it is possible your releasing a "Mini Red Tide" on your tank when you clean the filter. Although the species Karenia brevis is a non-benthic planktonic swimmer excessive concentrations could be massing under the light, when you clean it most of the dinoflagellates could be released back into the tank poisoning the inhabitants.

There are hundreds of algae out there that can produce toxins, you never know with our little experiments .

My personal vote is for coincidence, look at the fish that died on you. An Achilles tang is the hardest tang to care for out there... period. How long was he established in the tank for prior to the incident? Anthias present a similar situation, although the Bartletts are more hardy than many out there it doesn't change the stats. Your third fish that died was a cleaner wrasse, was he eating frozen prior to the incidents? These fish also have horrible track records in captivity.

Would you please be as kind to post your system stats & maybe a few photos of the scrubber itself?