Something wasn't settling with me right about the theory. I am colorblind and I use my son and my wife for the color chart readings. Only recently did I realize the Ammonia test strip had a yellow and white side to it. I thought the yellow side was the bottom and not the one to read so I was a little slow on the uptake on that. Anyways, my wife checked the Ammonia levels twice in a row just now and its 0. Not 0.5 but 0. Also, my Pink Glo looked wrong almost immediately AFTER me changing 3.5 gallons of tank water with distilled. However, the tank not cycling would make sense for the 2 Corys I had that lasted less than 12 hours. The Glos I added did fine. The Pink Glo was in the first batch of fish introduced to the tank and is the ONLY fish now that is experiencing issues.You state you are losing fish, another you expect to die today, and there must be a reason. The most likely is the tank is not cycled. Ammonia is present, so that supports this conclusion. The daily water change of 60-70% of the tank volume is to prevent ammonia poisoning of the fish. Nitrite will be the next thing to show up, it is just as deadly. Daily water changes, using Prime if possible, until ammonia and nitrite are back to zero.
Oblio posted as I have been typing...same advice, and I agree to include good substrate cleaning at the water changes.
To help, here is a link to the Cycle section; the first couple of posts are "pinned" because they are explanations.
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Cycle your Tank
Cycling a tank is vital to keeping your fish alive. This section is where you can read about cycling (the nitrogen cycle) and ask questions about how to do it properly.www.fishforums.net
UPDATE on Pink Glo: Its still alive, still looks a little weak but alive.
How do I save the Pink one or is it a gonner? Do I still need to change the water as suggested to even have hope for the rest of the fish?
Thanks,
Aaron