[Suzanne]

I have a 157 gallon tank. I currently have 1 REd Top (2.5"), 1 Neo Tetracanthus (very territorial) (4.5"), 1 red jewel (2.5"), 1 Pearl Zebra (3"), 1 blue Dolphin (2.5"), 1 Eye Biter(5"), 1 Red Peacock (2.5"), 1 Sunshine Peacock (2.5"), 1 Buffalo Head (2.25"), 1 Tilapia (1.25"), 1 Five Sar General (2"), 1 OB Peacock (1.5"), 1 Electric Yello Lab (1"), 1 Johanni (2.5"), 3 catfish (2"), 1 Mango Pleco (2.5").

I have had 1 Frontosa (1.5') missing and assumed eaten fully, 1 Johanni (3+") dead as of today with no signs of fighting, 1 colbalt blue dead with a fat belly (not bloat) and no aggression marks and one partially eaten gold nugget pleco. There have been a couple of other, can remember names at this time.......

What is going on????? Any water changes have only been up to 20 gallons at a time (1xweek) and all Amonia, Nitrites, Nitrates, etc. are good. I add cycle and just started adding Aquarium salt to the tank.........

 

[Dewdrop]

I'm pretty new to fish keeping and I'm not very familiar with most of your fish but a few questions come to mind.
1.Is it an all male tank? If not that may be part of the problem with only one fish of each species.
2. How long has the tank been running with fish? I'm thinking the fish aren't real big so maybe not long? Maybe it isn't completely cycled?
3. You sure your test readings are ok? 20g.water change per week doesn't sound like much to me but then again it's not real heavily stocked so maybe it is enough (I'm not familiar with that big of a tank either).
Hope someone else can help more.