BNye

@LiamDo you have a nerite snail? Looks like nerite snail eggs to me, I have some that look just like this in my tank as well. I don't have experience with pygmy cories, but the cory eggs I have seen are generally more round and have more volume rather than being somewhat flat on the glass.

I am not familiar with the exact size of CPD fry, but you could try using window screen mesh. I believe they sell rolls of it to cut to size at home depots or lowes. Other hardware stores may also have it.

I believe he says you can. Here is a link to his med trio vid.

@JeamyeB I hope they get well soon. What is the name of your water conditioner just out of curiosity?

@JRaffy I don't personally have any tidal filter, but I think that it combined with the sponge filters will be enough flow for the aquarium. But if it ended up not being adequate you could just add an airstone in the middle of the tank for a little extra flow. For air pump I have an aquatop AP100 that powers 2 air filters and I had to turn the airflow down. It has to different outputs so you could have a output for each air pump and if you wanted a third airstone you could use a splitter in one of the lines to do it. I also like the Fluval Planted 3.0, I don't however like the price. I think that it would probably be a little overkill for just amazon swords, but the way you can optimize it with an app is nice for adjustment so you could turn it down. If you wanted to try a cheaper option you could also try a stingray and see if that works for you. I don't have personal experience with stingray lighting only what I have researched on the internet.

@cornelius85 That is helpful thanks. What other fish are in the tank? And it is a lump correct not like a open sore like a hole in the skin?

Is there anyway to get a little bit more clear of a picture in the QT tank? I can't quite tell on this picture. Where on the body is it located?

@Daniel I agree, I also think that a lot of people jump immediately to what medications do I use to fix the problem. When in reality the problem is the parameters or another stress and the disease is the bi-product of that stress. As the medication may temporarily help the fish in the long term, an illness will most likely come back rather the same illness or another. I also think that it is easy for some to jump to adding all the medications rather than identify and utilize a medication specific to an illness. It is often us adding medications that we don't understand or that are not effective for our illness that deals more damage to the fish that the illness itself.

How big are the goldfish? Do you by chance know how different the water was. I think the only real factor with different water chemistry would be if the pH had a huge difference some difference is fine in my opinion. What is the temp in the tank? Have you been using any medications? Pics?

@JeamyeB I think, for a molly, 150 ppm is a little bit soft still as well as they prefer a little higher pH, in my opinion. Maybe try adding crushed coral to harden and buffer the water a little bit. The hardness and pH I don't know if it would cause an illness, but if it is stressing the mollies out then it definitely is a contributing factor. How long have you had the mollies for are they new or have you had them a while with no issues?

@Dvrich89 In my opinion, I probably wouldn't worry about it for now unless it seems like they start hurting themselves or it is affecting there quality of life. I think it might help still to bring your tank temp down to 75F-76F and see if they continue to flash as frequently.

@Daniel Not always something to worry about unless you can see signs of distress or they are doing it all the time. I had African cichlids that would just scrape the sand when they felt like it lol. I don't worry to much either unless it seems to be harming the fish. I don't love putting anything, but water in my tanks either. Seems to be that is the way aquariums work. There is always something smaller that I have to try to figure out if it is fine to be there or going to cause a problem later.

@Dvrich89 During water changes it could just be the crud getting kicked up while changing sticking in the slime coat and irritating the fish so I wouldn't worry to much about during water changes unless they hurt themselves. What do there gills look like? Are they really red? Doing it every once in a while is normal, but if they do it a ton, besides water changes then there is something bothering them.

@DanielIt is when fish rub against objects or will like turn on their side and hit the gravel. Its almost like the fish is itching itself against something. Can be a sign of irritation of the skin/slime coat or of external parasite. This is my best understanding.

@Dvrich89 I don't know if you've already seen this video, but here is a link to an aquarium co-op video on neon tetras. I don't know to much about them, but this might help.