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North American Killifish Summer-Winter Tub advice?

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Hi everyone, thanks for allowing me in the group. I've already learned so much, but need some help. I live in Northern Virginia, USA for context. I am preparing a 40 gallon outdoor pond tub to be on my deck. I'd like to *try* to make this tub last all year into next winter. For that reason, I'm considering one of the following killifish to tub: Fundulus heteroclitus (Mummichog), Fundulus diaphanus (Banded killifish), or Fundulus chrysotus (Golden Topminnow). However, I'm getting mixed reports if it can be done. I plan to have 2 sponge filters going all year. I was going to out a heater in the winter, but I heard somewhere it could add $100-200 to the electric bill. Could any of these species survive a Northern Virginia Winter in an above ground tub with temps getting as low as the teens farenheit (-11 - -7 C) but mostly in the 20s and 30s farenheit?  If not, does anyone have any suggestions on killifish or what I could do to make this work?

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Glad you’re beginning to enjoy the forum! Most of us outdoor tubbers just bring fish in when weather is too cold. 

If you’ve never done tubbing before, maybe try a late spring - through to - early fall schedule this year. Then, sell what you want, bring in what you want, etc.

Here’s how we started last year (just a little 15 gal tub)...


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