Emergency, lost two mollies

I just lost to of my female mollies tonight can't figure out why they were fine during feeding. I am Currently testing my water so far my water looks like it is perfectly fine I can't figure out what is really going on.
Ph about 7.6
Ph range about 7.4
Ammonia 0ppm
Nitrite 0ppm
Nitrate i believe is reading 40ppm it is hard to tell with the color.
I recently been trying to fix 5he shimmie problem but doesn't look like anything is helping I done a small water change on Thanksgiving where I only took out about 5% of the water to get the leftover food out because before that I did a 10% water change like I been recommended. And I am still loosing mollies I also tried to increase my filtration by adding a sponge filter to the canister i already have on the tank and still having problems

 

I'm hoping someone more knowledgeable will comment but since it's kind of late and doing nothing sucks, try doing a 25-50% water change and double the dose of Prime when dechlorinating it and match the temperature as best you can.

When you take out the dead fish, give them a close look. Are there any tiny white dots? Discoloration of the gills?

 

I'm hoping someone more knowledgeable will comment but since it's kind of late and doing nothing sucks, try doing a 25-50% water change and double the dose of Prime when dechlorinating it and match the temperature as best you can.

When you take out the dead fish, give them a close look. Are there any tiny white dots? Discoloration of the gills?

When they die they look like they froze in one spot I don't see discoloring but they did look like a tad bit I guess you can say bloated but I am not quite sure about that part I don't know if the where fat, pregnant, or there stomachs where getting bigger because the normal look wider because they are female

 

Like I constantly watch my tank and I didn't see anything different. And I have not had them even a full year

 

I second the advice above, do a WC and double the Prime. Would you be able to get a picture of the bodies? What other inhabitants are in the tank, and how have they been affected, if at all? What temperature is the tank at? If you've got the time, see if you can fill out the emergency template.

The bloating may have just been due to how recently they ate. The only thing I can think of is that they might've eaten a morsel of something poisonous that fell into the tank, but that seems unlikely.

 

I second the advice above, do a WC and double the Prime. Would you be able to get a picture of the bodies? What other inhabitants are in the tank, and how have they been affected, if at all? What temperature is the tank at? If you've got the time, see if you can fill out the emergency template.

The bloating may have just been due to how recently they ate. The only thing I can think of is that they might've eaten a morsel of something poisonous that fell into the tank, but that seems unlikely.

The temperature is currently at 77 when I last checked because it sits in a cooler area in the house. And the bodies already been thrown out it didn't cross my mind to take a picture of them before throwing them out. All the other fish are fine accept one that is recovering from near death she is slowly putting her weight back on but she looked much worse then she does now. My only other guess is a Parasite is in the tank I been doing a treatment for the past few days that suppose to help my water but it doesn't seem to be doing any use

 

They always been eating a mix of food that I have not been having trouble with which is brine shrimp, river shrimp, tropical flakes, wafers,blood worms, shrimp pellets, and bug bites for my dwarf gromius

 

I have seen some of them rub up against things lately can that be something?

 

Everyone is doing ok right now my only fish that is sick that I think is getting better is still holding I am still questioning if she is or not since she lost quite a bit of weight when she was really sick