Someone unravel this mystery

Final Note:
Lights came up on a barren tank this morning. The last discus in pale with no color and swims with his side up against the filter intake... he won't eat of course. The remaining loaches are in hiding under the driftwood and they too will not eat. During the night (as if to mock me) the red algae has taken a firm foothold on every plant in the tank and I am disheartend.

When I looked in the tank the only thing I could think of was a line from Poe, "...and the red death held sway over all."
 
Sorry for your losses.
unfortunaltely the toxins may have built up or even possibly been fat soluable..the reaction to the fertilizers may have been delayed.

why do you use Discus essentials??
 
I am so sorry for your losses. I can feel your pain in your posts. Planted tanks with fish in them are a delicate balance, especially with discus. Don't beat yourself up over this, you had no way of knowing what would happen. I can't even imagine being in those shoes, turning the lights on the tank and.....no life....... I hope you get back on your feet again, get the planted part of that tank growing fine and get yourself a few new discus! There's no cure for discus fever you know! Check out Dan at gulfcoastdiscus.com! I don't know how far away you are from him, but he's got great fish!
 
Thanks to all.
I started using Discus Essentials because of a slight degradation in the vividness of color in my discus some weeks ago. I found a few years back that a weekly dose of this was helpful, and indeed it was in this tank until something tipped way over the scale.
 
Unfortunately no, I don't have a hospital tank at the moment and do not want to risk contanimating my other healthy ones.

Oddly enough, I just tested my water (combatting water cloudiness) and I found a huge ammonia spike... almost 1 ppm, which would account for the behavior of the survivors... Considering that I just did a huge water change yesterday and the tests both before and after showed 0 ppm and that I know there are no dead fish hiding in the tank, where could this spike have come from? Did whatever caused my chaos wipe out my biological filtration as well? I use a 3 chmabered sump with bioballs, floss and purigen.

Obviously I just did another massive water change, but seriously WTF? Did this tank anger the gods or something?
 
i was totally going to say that. anything that can sterilize medical instruments can certainly damage your beneficial bacteria.
 
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