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Water garden depth

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#1 Joshaeus

  • NANFA Guest

Posted 12 September 2018 - 09:16 PM

How deep does a water garden need to be for a cooler layer to form at the bottom? I was considering getting a 40 gallon tuff stuff water trough for a water garden if my landlord does not permit the 110 gallon one I desire, but it's only 13 inches deep...wanted to know if this was deep enough to safely keep fish without frying them. Thanks :)

#2 gerald

  • Global Moderator
  • Wake Forest, North Carolina

Posted 13 September 2018 - 08:44 AM

My 10-inch deep wading pool is noticeably cooler on the bottom, but the more depth you have, the longer it will stay tolerably cool.  With prolonged heat, eventually the bottom layer will over-heat too (or oxygen will be depleted).   

Gerald Pottern
Hangin' on the Neuse
"Taxonomy is the diaper used to organize the mess of evolution into discrete packages" - M.Sandel

#3 JasonL

  • NANFA Member
  • Kentucky

Posted 13 September 2018 - 11:37 AM

If you are in zone 5 as mentioned in another post, you should be fine if you avoid direct afternoon sun, put some plants in and stock the appropriate heat tolerant fish species.

That said, there's a chance it will freeze solid if you get a cold winter which we have had lately.

#4 Joshaeus

  • NANFA Guest

Posted 13 September 2018 - 12:10 PM

Thanks! I will tear it down in the winter to keep it from freezing solid

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