I'm new to the fish world and having quite a rocky start.
My mom had the tank and decided after having it for years she was ready to give up the hobby so I quickly jumped on taking and setting it up for my baby to enjoy.
It's a 50G tank, started by cleaning everything, setting it up, adding water conditioner and letting it run for over a week before adding anything.
Picked out about 15 fish (some small fish so sales guy said I had a good number to start and get the tank running smoothly)
Things were fine for about 2 weeks and then one evening I noticed a dead fish. After further inspection I noticed a couple others had what appeared to be ich.
It was strange it came so quick becusse my son and I watch them daily and I hadn't noticed anything before this.
I removed the dead fish and treated for ich, the next morning I did a 30%-40% water change
We did this a total of 3 times when we were certain everything was cleared up.
But water had gotten cloudy and being new I never thought Of the fact the treatements would set the aquarium off balance.
So we had lost about 8 fish before finally treating ich and getting the tank back to a 0ppm amonia nh3
Thought all was well... until yesterday one of my white fish (a type of molly I think) started swimming like CRAZY. I'm talking very quick spuratic, spins, loops, upside down, etc before resting in the bottom with laboured breathing. She died before I could try peas thinking a possible case of swimmers bladder.
The only thing I noticed off with her was her fins were all tight to her body prior to dying.
During her big swim fest I see my pelco floating upside down looking as though it's stuck to the surface of the water. Thinking it was dead, I touched it and it quickly swam away. Since then it would continuously do that on and off for the remainder of the day until it stuck to the upper side of the tank, where it's been hanging ever since. Nothing visually seems off except it's behaviour.
Today one of my other fish seems a bit slower then usual, fins not tucked right Into body but not as streatched out as normal.
Last night I did a few peas up and fed it to them. All the fish ate it (and all looks a bit less bloated today) but I couldn't seem to get the pleco interested.
I'm completely at a loss, as is my mom who has had a tank running for 5 years with minimal losses and treatment generally saved the majority when ich was her problem.
I'm not sure if this is related to ich itself, my treatment, or the water being off to about .25ppm for a day before restored back to good quality.
Any insite would be greatly appreciated !!
I should also add when picking out the fish myself and the sales guy went over (for about an hour) my best options for fish. When I picked one type out I had saw one that looked unique to the others and said I wanted that specific one. He said OP that's ones actually sick, so you can't have it. But he did allow me to pick a different one from the same tank. Not sure if this is where my problems started from, and can't remember what he said the fish had.