Oto Temperatures - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 3 Old 09-21-2012, 12:32 AM Thread Starter
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Oto Temperatures

I tried to find the information in the forum and elsewhere but couldn't seem to get this answered. I know that the ideal temperature range for otocinclus catfish stops at 79F, however are they able to tolerate higher temperatures?

I have them in a tank that stays at 77F and was wanting to put a heater in it to treat for ich that my betta introduced to the tank. The temperature would eventually be reaching 86F ideally to kill the parasite, and I was trying to find out if this is something they can tolerate. These are new guys, and I'm kicking myself for not noticing that my old betta had ich when I put him in the tank.

I'm not looking for illness treatment advice, just information about the oto's ability to handle higher temperatures, just to clarify.

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post #2 of 3 Old 09-22-2012, 06:11 AM
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To clear your question... Yes usually Oto's do survive at temps up to 84 degrees and people have even had success in keeping them at temps like 86 though i dont know if this is good for them and they probably wouldn't tolerate it for long. Hope this helps If i were you id go for it....

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post #3 of 3 Old 09-30-2012, 01:48 PM
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Misakitty, are you familiar with our fish profiles? Second tab fro the left in the blue bar across the top of the page. If the scientific or common name used in the profile is typed identically in a post it shades, and becomes a link to the profile, example Oto Catfish or Otocinclus macrospilus.

In each profile it lists the "preferred" water parameters, including temp range, for the species. That of the oto is 21-26C or 70-79F. So, I would not maintain them above 79F. All fish, with very few exceptions, fare better at the mid-range for their species; at higher temperatures the physical metabolism has to work in overtime, so to speak, just to maintain the fish's internal balances, and this can weaken the fish and reduce the efficiency of its immune system to fend off disease.


Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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otocinclus , temperature

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