Susceptibility of Fry to Ich? - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 3 Old 11-07-2011, 08:39 PM Thread Starter
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Susceptibility of Fry to Ich?

Just a general question --- are fry more susceptible to Ich then fully grown fish? Or to displaying the white spots? I am treating a tank for Ich now unfortunately - the 16 fully grown fish (Barbs/Rasboras/Oto Cats) display no spots although a few of the barbs "flash" from time to time. The Barbs had fry (yay!) and over the last two days 3 of the 5 fry have developed the white spots and have been "flashing". This just led me to wonder if Fry are more susceptible or it was just coincidence that it has only been my fry to display so far.
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post #2 of 3 Old 11-10-2011, 12:18 PM
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Just guessing, but if fish immune systems develop anything like humans, it takes a little time for their immune systems to ramp up after being born, so they may be more susceptible. It's just a guess however!

18 species/varieties of fish, 15 species/varieties of plants - The fish are finally ahead of the plants!
*560 gallons (2120 liters) in 5 tanks -> you do the math.
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post #3 of 3 Old 11-15-2011, 12:48 AM
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DKRST is on the right track, fry are more susceptible to any illness than a healthy adult fish will be, however, that also means they are more sensitive to medications, too. Most medications are too harsh for most fry that are very young and many people end up killing fry by treating them with meds rather than losing them to the actual illness.

I would suggest moving forward with caution and to avoid medications with fry whenever possible. In situations with ich, most healthy fish can fight it naturally without the use of medication, so its not surprising that you aren't seeing it on the adult fish.

Dawn Moneyhan
Aquatics Specialist/Nutritionist
Juneau, WI
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