Tips for adding a heater to an aquarium with fish already in it?

February 23, 2009
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tips
andreak1013 asked:


I have a 5 gallon aquarium and would like to add a 50 watt heater for the winter, as temperatures are already starting to drop. However, I already have my three fish in it. Is it safe to add a heater while fish are in the aquarium, and does anybody have any tips on how I might go about it??

Thank you!
Sorry! They’re danios. Definitely tropical fish.

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4 Responses to Tips for adding a heater to an aquarium with fish already in it?

  1. msjmh on February 27, 2009 at 2:08 am

    First we’d need to know what kind of fish you have. If they’re goldfish they absolutely should not have heat.

  2. Emms on March 2, 2009 at 6:51 am

    Assuming these are tropical fish, adding the heater is not a problem.

    It is not an instant heat situation where the temp will change drastically in a short span of time. Aquarium heaters take a bit of time to get the temp up to whatever you’ve got it set at, so adding it while the fish are there is not going to create an issue.

    Good luck. :)

  3. Armour on March 4, 2009 at 2:56 am

    Just add the heater!
    if it is preset for tropical fish like mine than its great, if not, then set it to the correct temperature, that shouldnt be a problem at all.

  4. Iain L on March 5, 2009 at 6:35 pm

    Set it to the correct temperature and put it in simple as that.

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