Starters PH 7.0 GH 120 KH 0 NO2 0 NO3 <20 Ammo 0, Temp 78, 55 Gallons, Gravel Substrate, varied frozen/pellet/flake diet. Occupants 1 Molly, 5 Platy , 3 Emerald catfish, 2 guppy, anacharis.
Last week sometime, maybe before, I had a silver molly die all of a sudden. She was big and healthy looking one day then the next she looked deflated. I wrote it off as a bad case of labor/stress. I just found my male molly dead. He was a black lyre tail molly. He got sick about two months ago while cycling a smaller tank. But he bounced back fine after going to the big tank.
Both fish were asymptomatic. Fins in tact, no discoloration or apparent shedding. From first notice of something being off to death were less than five hours each. Around one this afternoon I noticed him listing and riding the current from the filter. This is exactly what the silver female did before she bit it (She also appeared to have fin lock). I was doing a very larger water change when I noticed it, so I hoped that would help. Freshwater, is every fish's cure right?
Anyhow, now I'm concerned that the final female molly will be susceptible to to what ever did in the first two. I'm also concerned for my other live bearers.
A side note: I had a Fancy guppy in the tank but had to remove him a couple days ago because the Molly were fin nipping. This was a problem before the female died last week. She was fin nipping one of the gravid platy. When I saw the bite marks on the fancy guppy I removed him. As I was fetching the net I saw the male molly take a nip. Could there be something to that?