HELP!!! My Pennywort is dieing!!!! It may already have died...

and how are the fish doing in this tank??

A few deaths but not surprising since I have over 80 fish in this tank. I'm not entirely sure whether my fish are alive or dead. They hide so well. Its heavily planted and I can't see any of the fish. I haven't seen my bristlenose in a week. 1 of my rams has been missing for 1 week too. All of my threadfin rainbowfish disappeared overnight. Except 1 that disappeared the next day. No bodies. 1 of my dwarf frogs I can't find anywhere. I thought all my cories had died until I found them schooling at 1am. My dwarf shrimps haven't seen them since day1...etc a few other fish too.

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i've had brazilian pennywort in my 29 gallon very low tech planted tank. No fert, no co2, very little light, and it still grew like a weed. I'd imagine it wasn't pennywort but something else? dying fish are never a good sign.
 
i've had brazilian pennywort in my 29 gallon very low tech planted tank. No fert, no co2, very little light, and it still grew like a weed. I'd imagine it wasn't pennywort but something else? dying fish are never a good sign.
Thats the thing i dont think that they are dieing. No bodies. I just cant find them in the tank.
 
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