Fermentation belts are great cheap alternatives to other vat heating methods.

Fermentation belts I use (affiliate links ahead!)

Simple Belt heater - (cheapest works great) - https://amzn.to/3S9ESHB
Pad Heater for heating bottles outside of the vat - https://amzn.to/3Uit1tL
Kombucha Heater (works great for heating a single bottle) - https://amzn.to/3UcXpFH

00:00 Intro
00:14 - What is it?
00:35 Why you need this or don't
01:54 Comapred to enclosure
02:11 Results
03:10 Heating resin outside the vat
03:50 Final thoughts