The size of my tank: 55 Gallon.
Test Kit used API Master Freshwater Test Kit. Did one two hours ago Water parameters are as follows:
High Range PH: 7.8
Ammonia: 0 ppm
Nitrite: 0 ppm
Nitrate: 10 ppm
Tank is Freshwater.
The Aquarium is new. I set it up about five days ago, I moved everything over there from my twenty gallon(6-8 months old) and ten gallon(two years old). Substrate, filter cartridge, driftwood, heater, plants, water and fish. Had no problems until now.
Fish in my tank: Eight Mollies, three swordtails, three platies, three variatus, eight corydoras(four schwartz and four emeralds), one male dwarf gourami and two bristlenose plecos. I've had all the ones in there but one bristlenose pleco and four cories(got them a few days ago) for several months, one molly I have had for over a year. Aside from the babies who will be re-homed once big enough.
Three of the platies and five of the mollies are still practically fry or in juvenile stages, just barely big enough to not be eaten(about three quarters of an inch for most, and half an inch for one molly). One of the plecos is still very young and only about two and a half inches long, the other three inches long. All but two of the fish in there are under a year old(those two being the swordtail and creamsicle lyretail molly) The largest molly I have in my tank is about three inches long, maybe a little bit more, and a male swordtail that is about the same length, minus the sword. The cories and pleco were not quarentined.
The temperature is currently 78 degrees.
There are A LOT of plants in the tank. A few anubias, one I have had over a year, the other I've had a few months. Many stem plants. Some duckweed I got a few weeks ago, one small swordplant. Does aquarium wood count? Had that for a few months now. I cannot remember exact names of all plants, sorry. =/
Filter is an AquaClear for a 40-70 gallon tank, I have it turned down. I change it once a month(I know it says every two weeks, but I was told by several members on here that I should do it only once a month).
I just use the filters and heaters.
The tank does not get any sun. My lighting schedule is about eight hours per day. There unfortunately isn't a set schedule as my own is very hectic and random. x.x But it usually goes on between two am and eight am, and off eight hours later. Occasionally they get an extra hour.
I did a small 5% change this morning, about five hours ago. Normally I do a 25% once per week, vacuum a quarter of the substrate, new spot each week, so I don't mess up my bacterial system.
My fish are fed once per day, sometimes twice(once half hour after lights on, and sometimes once before lights out, small portions only on those days). I usually give them fresh veggies like cooked peas(two to three times per week unless someone has a problem), spinach, romaine lettuce and the occasional green bean(not all at the same time, I switch it up so they don't get bored). I also give them frozen brine shrimp or tubefix worms(defrosted of course) twice per week. I also put two small algae wafers in twice per week for the cories and pleco, but the other fish enjoy them as well if they find them. They are also given tropical fish flakes every other day.
This morning they were given a small amount of brine shrimp. By small I mean about a quarter of those small bubblepacks of it. I also put in a small algae wafer, one smaller than a dime, for my cories. The fish did munch on it as well, but not very much.
I have not seen anything out of the ordinary with these fish in the last three months. They all seem happy, active, and are often breeding. lol
I have not done any treatments, I have no idea what to treat. x.x
Onto the problem at hand....
I was sitting here watching my fish, and my female red neon swordtail started swelling at a rather fast rate, right before my eyes. I didn't see her hit anything or get injured, she was completely fine and was breeding with a smaller male swordtail. Maybe something happened then. He just did his thing and she swam off, he chased after another girl. Five minutes after this she swam into my view in the middle area of the tank and started kinda bobbing side to side a little. Like you'd see them do if they had trouble pooping. Yesterdays feeding was a pinch of flakes and some cooked peas in the evening, I don't think she'd be constipated...Anywho, she swam up top after that and started swelling during this time. And I mean really swelling, it took her less than five minutes to get about the size of a large marble, and it looks like something broke. I am not sure if it is blood or air that is in there, but it looks like a bubble of something. She can no longer hold herself properly and is slapping around on the top sideways.
I have no doubts that she is going to die, and I hope it comes quickly for her as this cannot be comfortable.She cannot swim down, she just hangs sideways at the top and doesn't go anywhere. But I need to make sure this isn't something that is going to hit others in my tank. She had zero signs of anything off before this. No bloating, she was active, mating, swimming and pooping normally before this. She pooped normally this morning, about two hours prior to this, I didn't see anything off with it, kinda hard to miss when she swims by your face. ^^; But hey, I check for things that look off in that too. Oh yes, she was also pregnant. I do not know how far along, she was only just starting to round up. She gave birth about two weeks ago.
Rough estimate on how much she actually swelled? I think it was about...well, let's say she was more than an inch and a half around...she musta gone to about four or five times what she was minutes before.
Ahem...What in the heck just happened?!! Did my male kill her in breeding? I didn't see her hit anything or act in pain, he didn't bite her or really even chase her, she invited him in, left normally like nothing happened. Just cruising around the tank like normal fish do. That freaked me out I thought I was dreaming!
Well, I've got a headache. It'd be great if someone could unbreak my brain(not the cause of it, I'm sure, since brain breaking is mental) and tell me what went on here. ^^;