Dead Lemon Tetras

[Mojo31]

Not sure what to make of this. Last night I went to feed the fish and found that of my three Lemon Tetras, two were dead and one cannot be found! They were healthy and active the day before along with everything else. No obvious illness or stress. Water tested out to be okay on every parameter.

Tank contents (56 gal):

9 Rummy Nose Tetras
4 young GBRs
5 Corys
1 small albino Pleco
1 Marble Hatchet
2 Blue Gouramis
2 Angels (not mating)

Not necessarily looking for answers unless anyone has any ideas. Just stumped.

[jmsaltfish797]

there's a possibility that the angels are the culprits. I had to rehome my angels due to them beating on my loaches. Not saying this is the case with your tank, just my experience.

[AirstoND]

You didn't mentioned several things:
1) How long have you had the fish?
2) Recent water change? Temperature/water pH induced stress? u did say they were active.
3) Were they schooling together? If some were separated from school they were probably sick

[Mojo31]

Had the Lemons for quite awhile. If it were old age I wouldn't expect three that were healthy and schooling on Wednesday to be gone on Thursday.

Came home tonight to find two Rams beat up and dead. The Angels were cowering in the back of the tank. The Gouramis were out in the middle alone. Male looks like he'd like to get amorous with the female. Put both in a separate tank to see how that goes.

Everything was active after last water change with no sign of stress. Always match water temp during changes and our h is stable. Nothing looks sick.

Five dead fish in two days with no signs of any abnormality.

[kwheeler91]

Well you do have two large gouramis.... not really ideal for smaller tank mates. Not to mention the angelfish, and rams can get mean at times. All it would take is for one of the more aggressive fish to start an attack and the others would probably join in. frenzy time. My best friend saw this happen with his yoyo and clown loaches, which were always peaceful, they devoured a full grown green severum.