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Fermentap FermWrap Heater.
Unit measures 11 “ x 24” 40 watt heating mat. Made in the USA UL listed and approved. Designed to remain below 110F/43C to prevent overheating. Keep your Kombucha, Ginger Beer, Jun or other ferments that require warmer temps happy year round
Ferment advises not to sit your container on top of the pad. You can wrap around tightly and secure with electrical tape, or move a little farther way for less heat, or wrapped only partly.May wrap 2 or more containers.
Recommended options (not necessary but make life easy)
Infrared IR Laser Digital Thermometer $8,95 just point and click even from across the room.
Digital Thermostat. Easy to read, easy to set. Set it and Forget it.
Multiple Uses; kombucha, Kefir and yogurt fermenting, drying herbs or fruits, or germinating seeds. Sprouting seeds, wheat grass, also a neat and clean foot warmer, and a neat lizard playground. Bury the mat under 1-2 inches of sand and place the temperature probe under the sand. Fermenting beer, wine, vinegars, especially great for Kombucha Tea but other fermented pro-biotics as well, or at the same time.
For kombucha brewing, Time and Temperature are 2 of the 4 most critical variables, others being type of tea and sugar. Most researchers seem to favor a 6-8 day ferment at 80 F. (22 C) where a balance between taste and health are believed arrived at. Nowadays that appears to be a little longer, a little sourer ferment at about 10 days. In my opinion, it really matters most to the individual. The kombucha will ferment visibly well in a range from the mid 60’s to the high 80’s. One German researcher thought that a 90 degree temperature to be more optimal. The Home Brewer should keep in mind that at temperatures above 103 F enzymes begin dying off, in the low 60’s the kombucha favorite yeasts go dormant and other yeasts begin to flourish. Temperatures that are too high kill enzymes, temperatures that are too low and too slow drying may promote mold. Different ferments have more desired temperatures; 65 to 75 degree range during primary fermentation for beer, while 70 and 75 degrees as specified in many wine kits. For Kefir brewing, the best fermentation temperature is between 84 F (22°C and 30°C). Which is also ideal for kombucha. Some yogurt needs to be the 100-113 F range, while others like Caspian Sea Yogurt is fine in the 70-80 range. Researchers have found nearly 30 different bacteria and 25 different yeasts in Kefir cultures. Every bacteria and culture has specific temperature requirements. This is why a constant low temperature can't be compensated with a longer fermentation time, or a constant high temperature with a shorter fermentation time. Brewing needs some balance, like hatching an egg. When drying herbs, the right temperature is also important. With too low temperatures and maybe too high humidity, mold develops easily. Too high temperatures kill the life force, the enzymes of the food.
Do not cut
Do not Submerge
Do Not insulate both sides
Do not use if visible signs of abuse