VAV SEA Small Electric Dehumidifier, 1200 Cubic Feet (215 sq ft) Portable Mini Dehumidifier Quiet Use for High Humidity in Home, Bathroom, Bedroom, Kitchen, Basements, Wardrobe Closet, Office, RV… https://www.amazon.com/dp/B087YTM19N/ref=cm_sw_r_cp_api_glt_fabc_9X0T2S79RJXAJ73XZCFB?_encoding=UTF8&psc=1
Honestly, I just get the cheapest one. Check the reviews/ratings. Mine look like this one: https://www.amazon.com/dp/B087YTM19N?pd\_rd\_i=B087YTM19N&pd\_rd\_w=VdCGx&pf\_rd\_p=7ea8e9d0-fed1-49e8-a002-f2d3f5cb151d&pd\_rd\_wg=saw52&pf\_rd\_r=V7G2JEEHNT0QSEHJZAJ0&pd\_rd\_r=85a224d3-de71-414a-98fd-045bfa48c772
You don’t need a $200.00 humidifier. I’m in SW Florida and this is what I use.
VAVSEA Small Electric Dehumidifier, 1200 Cubic Feet (215 sq ft) Portable Mini Dehumidifier Quiet Use for High Humidity in Home, Bathroom, Bedroom, Kitchen, Basements, Wardrobe Closet, Office, RV… https://smile.amazon.com/dp/B087YTM19N/ref=cm_sw_r_cp_api_glt_fabc_AZT1B8500SQFNKW2VVVA
I'm guessing your 85-90% readings are with the fridge empty.
When I started curing meat, one thing I really didn't appreciate was how much of in impact the meat would have on humidity levels. Even a small piece of meat placed in the confines of a mini fridge will make your humidity level spike seriously for quite an extended period. So you will certainly need dehumidification.
I use this one: VAVSEA
I couldn't really find anything smaller that would work. But there are many that are pretty clearly rebranding of the same unit.
Just one word of warning. The controller units (like InkBird) just supply/cut the power to the dehumidifier. This means you need to get a dehumidifier with a physical on/off switch. When power is supplied to the unit, you can be sure that the unit is actually "on." Units that have electronic on/off switches will turn off when the power is cut, and remain off when the power is resupplied, and so your controller won't be able to initiate dehumidification.
That might work if the room your tank is in isn't that big. Otherwise I would maybe look at something a little bigger.
Not sure if my hyperlink will work or not. Hope this helps!
I use one like this in a 4x8. It pulls 115ml a day and drop me about 10% from the rest of the basement.
Small dehumidifier without logic switch, so it can be controlled by an Inkbird controller, for example:
https://smile.amazon.com/gp/product/B087YTM19N/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1
Inkbird humidity controller:
There are several other options, and I have the Inkbird temperature and humidity controllers with wifi (can check levels and change settings from your phone anywhere, any time). But this, at a minimum, ought to help control the humidity.