Originally Posted by CatherineSekel
Thank you so much Zof, I am very grateful for all the info!! I have lost a male guppy since my last post, which I am very sad to admit, but I am very happy now that I know what I can do to keep them healthy. I have not checked the link yet, but just in case it doesn't tell me the answer to this question, when I do water changes how much percentage of the water do I change? And what do I replace it with, like treated tapwater or..? Also Should I move my aggressive ram out of the tank into a 10gal or the one I'm worried about? Thank you very much!
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Catherine, first off, welcome to Tropical Fish Keeping forum.
Now to your issues. I read through this thread, and there is something wrong with your original Ram. The aggressiveness of the new Ram is only going to make this much worse, as this causes severe stress to the first Ram who is already in poor health. Remove the first (sick) Ram to the 10g. Hopefully whatever it has will not have infected the other fish or the tank.
Now to the second (newer) Ram. If this is the Bolivian Ram, they can manage with cooler temperatures than the common or blue ram. But White Cloud Mountain Minnow is a very cool water fish and I would not combined them with normal tropicals. Perhaps the store will allow you to return the new Ram? I certainly recommend it. First for the incompatibility with the white clouds, and second there are too many fish in this tank, not to mention the non-cycled aspect.
Normally, an aquarium that is balanced between fish, live plants if any, and the water volume should have a partial water change every week. The volume changed can somewhat depend upon the fish (the species, their size) in relation to the tank size, but 40-50% every week is safe. During the initial cycling, this is much more critical. Ammonia and then nitrite are highly toxic to fish, and even if they "survive" the cycle, they can have permanent internal damage that will result in poor health, additional disease, and/or premature death. Daily partial water changes of 50% are advised if either ammonia or nitrite is above .25 ppm. Your API test kit will allow you to monitor these.
Use a good water conditioner. During cycling I recommend either Prime (made by Seachem) or Ultimate (made by Aquarium Solutions) as these are the only two I know of that detoxify both ammonia and nitrite. But they only work for 24-36 hours, so daily monitoring of ammonia and nitrite is crucial to keep levels very low.
That linked article will explain cycling more fully. Good luck. And do not hesitate to ask along the way.
P.S. You will note the shading over the whitecloud and two ram fish names above; this means the species is included in our profiles, and you can click on the name to see information about the fish.