The shimmies

[Salty&Onion]

Yesterday I have noticed that my molly females are shimmying.
Clamped fins, gasping/gulping water at the surface, white non-ICH spots - Only in females
My male sailfin molly is sometimes clamping his fins when gasping/gulping water at the surface.
My female started laying (yesterday) on the bottom of the tank with clamped fins, not moving at all so I did a water change with really warm water of about 30 C , which has helped .. a bit.. she started swimming around with clamped fins.

Water hardness is about 190 ppm, pH is 7.2 , GH is about 16 and KH is about 8. I might be wrong about these as my test strips are finished and I cannot get them any soon..

Gold and black dust molly is in serious condition and dalmation molly is in mild condition. What should I do? Should I give them away or should I move them to another tank where water is heated?

Also my male platy (who is soo insecure) started hiding between my java fern and my filter... but he moves/waves his pectoral fins..

 

[FishGuest5123]

Shimmies are almost always due to water issues. PH is a little low for mollies but not bad. GH is fine. Can you tell us what your ammonia, nitrite, and nitrates are also? What is your water temp? How often on water changes? Shimmies usually stop once problem is corrected. Don’t add hot water too quickly. Only raise temp a couple of degrees everyone couple of hours. Pouring hot water in is never a good idea. Fish can go into immediate shock and die. I know, I did it once in my early days.

 

[Salty&Onion]

Water temp should be about 22 C. Not sure on ammonia, my water strips show 0ppm, nitrite is definentely 0ppm for now and nitrates should be at 20-25ppm. I'm not sure on those as my test strips for these are finished and cannot get them any time soon now. Did a water change yesterday and dechlorinated the new water with Prime.

 

[FishGuest5123]

Water temp should be about 22 C. Not sure on ammonia, my water strips show 0ppm, nitrite is definentely 0ppm for now and nitrates should be at 20-25ppm. I'm not sure on those as my test strips for these are finished and cannot get them any time soon now. Did a water change yesterday and dechlorinated the new water with Prime.

Your temp is definitely low. I’d do another large water change if 75% and add some warm, not hot, water to bring it up to 75F or 23.8 C (?). See if that helps.

 

[Colin_T]

You can add rock salt (often sold as aquarium salt), sea salt or swimming pool salt to the aquarium at the dose rate of 2 heaped tablespoon per 20 litres of water.

If you only have livebearers (guppies, platies, swordtails, mollies), goldfish or rainbowfish in the tank you can double that dose rate, so you would add 4 heaped tablespoons per 20 litres.

Keep the salt level like this for at least 2 weeks but no longer than 4 weeks otherwise kidney damage can occur. Kidney damage is more likely to occur in fish from soft water (tetras, Corydoras, angelfish, gouramis, loaches) that are exposed to high levels of salt for an extended period of time, and is not an issue with livebearers, rainbowfish or other salt tolerant species.

The salt will not affect the beneficial filter bacteria but the higher dose rate will affect some plants. The lower dose rate will not affect plants.

After you use salt and the fish have recovered, you do a 10% water change each day for a week using only fresh water that has been dechlorinated. Then do a 20% water change each day for a week. Then you can do bigger water changes after that. This dilutes the salt out of the tank slowly so it doesn't harm the fish.

If you do water changes while using salt, you need to treat the new water with salt before adding it to the tank. This will keep the salt level stable in the tank and minimise stress on the fish.

 

[Salty&Onion]

Your temp is definitely low. I’d do another large water change if 75% and add some warm, not hot, water to bring it up to 75F or 23.8 C (?). See if that helps.

I'll do it today, thank you. I'll be moving tomorrow or today my betta to a 15 gallon tank including his heater, but I'll first put in the mollies to see how they go and then I'm gonna be putting in my betta and hopefully this'll work.
I'll be able to get a decent heater for my 33 gallon tank and I'll set the temp for 25 C.

Thank you @Colin_T , but unfortunately I don't have this much aquarium salt, but I'll se and use the rest of my aquarium salt and I'll see if it will make molly condition mild than it is now.