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I had a school of cardinal tetras that I saw had white spot, so I put them in my hospital tank with Aquacare External Parasite medication, and the 3 remaining don't have any spots left and seem ok. I couldn't see any spots on any of the other fish in the main tank so i didn't treat it with medication (because I dont know if will hurt hte bacteria).

Today I suddenly saw one of my delphax corys not able to swim properly, and with about 3 white spots on it. I moved it to the hospital tank with the tetras and but its looks very sick. ry: I've turned the temperature up to 26 degrees in both the tanks.

I am going to the aquarium tomorrow to buy some protozin (becuase it sounds more reliable and I know I can get it) Is Protozin safe to use in a tank without killing hte bacteria? I don't want to have to cycle the tank again!!! 8O

Thankyou very much!!! Please reply quickly!

Protozin works very well, and is a reliably effective treatment and has only a minimal effect on the water quality. Although IMHO its one of the most effective meds you can buy, make sure you obey the instructions for use very closely though, as it is a powerful medicine and you dont want to risk toxic effects on your fish. Make sure you get the dosages correct, dose exactly in the correct intervals it recommends on the container ,and perform proper water changes and use carbon to get rid of it after.Make sure when you calculate your water volume you include the displacement caused by gravel and tank decor.

I just want to add.....I think that tetras in general are a little more sensitive to meds, so i think you should dose a little less....as LHG said, it is a very powerful med, and should be used wisely.......

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