Aren't "ultrasonic foggers" and "Coolmist humidifiers" the same, just ultrasonic humidifiers?
Yeah, basically. Sometimes, though, "ultrasonic fogger" is used to refer to products that are sold as just the ultrasonic element and a power supply, and you put the element in your own bowl / tank / container of water.
I have a ultrasonic fogger from
thehouseofhydro. Should I use that or get a Coolmist humidifier? Any product recommentations?
That House of Hydro one looks like just the element, and you put that in your own container / etc? There may be some splashing that you'll have to consider, but it'll work. You basically just need to balance the mist output with your ventilation / room conditions, your tank capacity with how often you want to be refilling it, your water type with how often you want to be cleaning/replacing the element, and have enough additional fans / circulating flow to help disperse the mist.
At 500 mL/hr, that fogger seems to be equivalent to a med-to-large sized humidifier.
I use
these ones in a 2'x4' tent. My lung room has been about 40-50% RH. Not sure what my actual ventilation flow rate is, but I needed two of them during the first half of the grow. It doesn't list mist output, but says it should last 25 hrs on a 3L tank, so that would be about 120 mL/hr (240 mL/hr total).
The other consideration is control - If you are using a separate humidity controller, you want to make sure whatever you're using turns on automatically when it gets power. For humidifiers, that usually means looking for one with an analog control knob rather than a digital control panel (which usually need you to press a button to start it after it gets power). The built-in humidity sensor in most humidifiers usually isn't too accurate anyways, so it's usually better to go with a separate humidity controller regardless.