How big are the two O's now? O's are a very hardy fish, but they do
grow, and grow fast. Two O's will not be able to live a heathy happy
life in a 25 gallon tank. Min would be a 55, and that would be with
excellent filtration, and tank maintance. Avoid feeding the O's feeder
fish. That is the surest way to introduce a problem into a tank, plus
they have virtually no nutrition value for the O's. Try getting some
earthworms, from a bait shop, or beafheart, to augment there diet. How
offten do you change/clean the water, the nitrate level may be high. O's
are extremly messy, and while your ammo, and nitrite levels might be
fine, due to an established bacterial culture, the nitrate, can only be
removed via water changes.



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