[rdnicolas]

Originally Posted by KrazyKuch

Plecos are freshwater, Also I see in your signature that you are using 3 fluval 404's, what media do you have in them???I have found that canister filters to be Nitrate factories unless you change half the media at least once a week....Also I see that you had a lot of fish in your system which would result in a lot of organic material in your water column and when your skimmer stopped running you could have possibly had to many toxins in the water!!

When you pulled the dead fish out of the water where their mouths wide open, cause thats a sign that they died from not enough oxygen!

I have 3 fluval 404's with the sponges and those cylindical filter media, other than that I have a phosphate media bag in one 404 and carbon in the other The third one has the fine mesh polishing filter.

Interesting point of the bioload and toxins. when my coral died, I left it inthere four a couple days to see if it would recover. I wonder if that may have caused it but then again I only lost them after the water change which would be odd. Good point of the fish well the sail fin had its mouth wide open but I didn't notice it on the other fishes. Maybe I was still in shock about the sailfin tang. I'm going to check the water parameters again to see whats going on.