Reddit reviews Inkbird ITC-308 Thermostat 110V, 1100W Pre-Wired Dual Stage Digital Temperature Controller Outlet Heating ＆ Cooling for Homebrewing Refrigerator etc.

If you just want to circulate the water, buy a submergible pump. I've had more luck with models designed for high temp applications, like (food grade) hot oil, but regular water pumps will do the trick.

If you want to also control the temperature of the water, either buy a sous vide or look into an Inkbird cooler/heater like this. Then add a heating element or a hot plate.

145w or LED will generate about as much heat as 145w of HPS. Stick with the HPS.

To get cooling under control, you'll need to post details. Or, better, pics. 600w isn't a lot in a 4x4. Lots of people do it.

Without details, look at a CoolTube style hood on it's own ducting circuit--pulling air from outside, through the cooltube, then straight back outside using a 6" duct fan. That gets rid of most of your heat, versus a bare bulb/wing setup.

Then get a decent 6" inline fan as your main exhaust for the tent. Run this through a programmable thermostat, so it's only kicking on when you tell it to (on at 75 degrees, off at 72, for example). A fan speed controller for the inline is useful, to limit noise and the rate at which you are pulling all the humidity out of your tent. But not strictly necessary if you have the thermostat.

Both ducting circuits (one for the CoolTube, one for the Tent) should be vented outside. Or at least outside the room.

I know that adds a bunch of cost. You can go cheap on the CoolTube, ducting, and duct fan. Don't go cheap on the inline. Having proper ventilation (and, IMO, a programmable thermostat) is essential to be able to run, well, in all seasons. You have a good tent/light pairing. Get the ventilation right, and you can dial in your environment. That's 80% of the battle.

https://www.amazon.com/Inkbird-Pre-Wired-Temperature-Controller-Homebrewing/dp/B01FTNL4DE/ref=sr_1_2?ie=UTF8&qid=1496347998&sr=8-2&keywords=itc+308

ITC308 controller from inkbird, $39, I got from Amazon. As described and fast shipment, I definitely recommend.

Inkbird controller, I bought one from Amazon.https://www.amazon.com/Fathers-Day-Gifts-Temperature-Controller/dp/B01FTNL4DE/ref=sr_1_1?ie=UTF8&qid=1464848450&sr=8-1&keywords=father%27s+gift+ITC308

You need a two stage Inkbird temp controller (https://www.amazon.com/dp/B01FTNL4DE/ref=asc_df_B01A6UZQX45379116/?tag=hyprod-20&creative=395033&creativeASIN=B01A6UZQX4&linkCode=df0&hvadid=167130986292&hvpos=1o1&hvnetw=g&hvrand=7187178485843403005&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9002216&hvtargid=pla-308523201570&th=1)

You need something to keep it cool (typically a fridge)

You need something to warm it up (I like this DIY set up http://www.brewstands.com/fermentation-heater.html)

You can use the thermowell but it isn't needed (tape the probe to the side of your fermentor and wrap bubble wrap around it for insulation. This will read the wort temp within 1°F.


You plug the Inkbird into the wall outlet. You plug the fridge in the cooling plug of the Inkbird. You plug the paint bucket lamp heater (or your heater of choice) into the heating plug of the Inkbird. Then you need to set your perimeters. I haven't used an Inkbird so I'm not 100% on what they are. Typically you will have set temp, temp differential (how far of a swing in temp you will allow), and compressor delay (this sets time in minutes the minimum wait time to turn the fridge on, this is used so it doesn't turn the compressor on and off frequently and wear it down).