Do you have a filter on the tank?
Are those your current water parameters? Do you mean 50 ppm nitrAtes or nitrItes?
Do you know about the nitrogen cycle? Because your tank isn't cycled if those are the parameters.
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Judging by those parameters your cycle wasn't complete, and the cloudy water is caused by a bacterial bloom due to imbalances in parameters. Your fish most likely died of water quality issues.
I switched my tanks coming from a 20 glln to this ten glln, I used my ceramic rings and some “dirty water” when I water changed, I let it cycle then added everything in.
My tank is several years running, and the nitrogen cycle is good.Are you overfeeding the tank, heterotrophic bacteria blooms are caused by excess organics in the water, lighting periods won't affect it. It's usually not an issue in cycled tanks, how long has the tank been running?
It sounds like a normal bacterial bloom to me.
Primafix is mainly antI fungal, but that doesn't mean that the bay oil in it isn't messing with other bacteria within the tank. By other bacteria, I mean other than the biological filtration as that stuff shouldn't really effect it, but it may be disrupting some of the bacteria in the tank.
It sounds as if your tank is established if it has been running for a few years. The only factor you changed is you recently introduced primafix. This suggests to me that there is now an imbalance in bacteria causing the bloom. Again, your cycle should be fine.
I've never really had to handle a bacterial bloom. You can keep doing water changes to clear the water, but this will still trigger the bacteria too reproduce. (which may be the slump you are stuck in now weeks later) Maybe try slowing on water changes so the bacteria can become reestablished? You water will get cloudy yes, but it may help clear it sooner than later. Of course monitor the health of your fish as you do this to make sure all is well with them.
Did you change anything in the tank recently? The substrate perhaps? A picture of your tank might help
Should do the trick.I just bought something called the Green Killing Machine. It is supposed to kill algae and bacteria in tank water. It is actually way too big for my 10 gallon tank, but if it works I may try a similar one with a smaller design I saw on Amazon. It uses UV light to kill the algae and bacteria. I will let you know if and how it works. Considering the size of this unit, verses the size of my tank, it may work faster than the two weeks some reviews have given it.
I think you may be right, this may be a bacterial bloom. I sure hope this works!
10 gallon tank, and Aqueon Quiet Flow 10 filter.