Mold in fish room

  • We are currently upgrading MFK. thanks! -neo
For those looking for a solution beyond a floor fan...

Common molds typically grow at 55% humidity and above.

Humidistats work much like the wall thermostat in your house and are used in the greenhouse industry a lot. Instead of sensing temperature they sense relative humidity and they're common in airtight super insulated homes and other environments where you need to monitor the interior air to ensure that it's not getting too stale or too polluted. For those with outbuildings that are your fish rooms you could rig up an exhaust fan on an exterior wall and use a humidistat as your control set such that anytime the humidity reached 50% the fan would automatically come on and keep your tank room out of the danger zone.

Humidistats are available on Amazon in the ballpark of fifty US bucks. Depending on the size of your fish room you may be able to install it yourself and for less than $200 total. If you're unfamiliar w/ CFM ratings and the like there are I'm sure several here that can help size your exhaust fan.
 
Hello; During warm (summer) weather I mostly have windows open (with screens). On somwe muggy days I run the central AIR of my heat pump which removes air moisture. During cold months ( Now) I run a DEHUMIDIFIER. The house is closed up now. Keeps the humidity down enough.
 
I run 3 fans 24hrs a day in my basement fishroom which has no windows.
Local weather humidity year round is 80% or above.
If I spill water I need to dry it well and make sure things a placed so air can flow around them. I occasionally get mold if I have standing water or dampness I didn't notice.

My kitchen cupboards get mold during our most humid months where a week at a time could be 97-100% humidity. I leave them open at night with the fan on and it seems to help a bit. Close them when I go back to the kitchen in the morning
 
MonsterFishKeepers.com