What could have happened . opinions pls.

[batang_mcdo]

Need your opinions on what could have caused this?
I yesterday I lost 3 asian arowanas
here's what happened.

they were about 7 - 8 inches in a 4x1.5 gallon tank.
I've had them for a few months already in that tank.
what changed was 3-4 days ago i got some plants from a friend. it came from a pond. I dumped some into my tank. 2 days later 1 of my aros developed cloudy eye. what i did was changed 30-40 5 water with water conditioner and rock salt. a day later i changed 20% water again. but before that i fed them a few pieces superworm after the water change 1 of my aros was belly up after a few hours. it was the one without cloudy eye. after that my 2 remaining aros were covered with white stuff like fungus. but the spread was so fast? I added melafix that night. but already had given up since the spread was so fast io just went to sleep whem i woke up both my aros were aldso dead

my tanks filtration was with a canister filter. containing filter wool, lots of ceramic rings.

I didn;'t have any test kits should have had 1 but wasn't able to buy 1 since i was panicking

 

[Nic]

wow that really sucks.... with no test kit there is no way to tell if some of your parameters shifted... the plants may have been a factor if the pond was contaminated....

 

[duke33]

Wow, that's a bummer. No way of telling without water tests. Sorry to hear.

 

[aquatic_wonders]

Sorry to hear that kaibigan but one of the thing I'm doubting is the plant cause that's the only thing you added right? since you said you have them for a while already on that tank but there might be other contributing factors too.

 

[Plecos_Ftw]

Maybe somethin in the plants? had you fed them superworm before?

 

[batang_mcdo]

yes, their regular diet are superworms and market prawns.
I'm not really sure what happened also . not sure if ammonia or anything else contributed but the whitish stuff was really fast.
if only i had test kits. I have ammonia test kit and ph test kit problem is i lost the instructions and the chart also .

now i'm not sure what to do. they were going to go into my 8 foot tank for my arowana community tank . My sump was delivered yesterday , unfortunately don't have an arowana community tank for now.