---
product_id: 285390720
title: "Durable Waterproof Seedling Heat Mat Warm Hydroponic Heating Pad 3'' x 20\" for Kombucha Tea & Beer Brewing, Fermentation, Seedlings & Plant Germination"
brand: "vivosun"
price: "210.30 DT"
currency: TND
in_stock: true
reviews_count: 5
category: "Vivosun"
url: https://www.desertcart.tn/products/285390720-durable-waterproof-seedling-heat-mat-warm-hydroponic-heating-pad-3
store_origin: TN
region: Tunisia
---

# Perfect size for seedlings & fermentation Waterproof durability for wet environments Consistent warmth for optimal growth Durable Waterproof Seedling Heat Mat Warm Hydroponic Heating Pad 3'' x 20" for Kombucha Tea & Beer Brewing, Fermentation, Seedlings & Plant Germination

**Brand:** vivosun
**Price:** 210.30 DT
**Availability:** ✅ In Stock

## Summary

> 🔥 Elevate your growth game — warmth that works as hard as you do!

## Quick Answers

- **What is this?** Durable Waterproof Seedling Heat Mat Warm Hydroponic Heating Pad 3'' x 20" for Kombucha Tea & Beer Brewing, Fermentation, Seedlings & Plant Germination by vivosun
- **How much does it cost?** 210.30 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/285390720-durable-waterproof-seedling-heat-mat-warm-hydroponic-heating-pad-3)

## Best For

- vivosun enthusiasts

## Why This Product

- Trusted vivosun brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted by Pros:** 4.4-star rating from over 1,100 users proves reliability and effectiveness
- • **Compact & Versatile:** 3'' x 20'' size fits bottles, seed trays, and hydroponic setups effortlessly
- • **Waterproof & Durable:** Built to withstand moisture, ensuring long-lasting performance in humid conditions
- • **Precision Heat Control:** Maintains stable temperature within ±1°C for flawless fermentation and germination
- • **Boosts Growth & Fermentation:** Ideal for kombucha brewing, beer fermentation, and nurturing delicate seedlings

## Overview

The VIVOSUN Durable Waterproof Seedling Heat Mat is a compact, 3'' x 20'' hydroponic heating pad designed to provide consistent, controlled warmth for seedlings, kombucha tea, beer brewing, and fermentation. Waterproof and durable, it ensures optimal temperature stability within ±1°C, enhancing plant germination and fermentation processes. Trusted by over 1,100 users with a 4.4-star rating, this heat mat is a must-have for millennial professionals seeking reliable, year-round growth solutions.

## Description

Other (Hydroponics)

Review: EDIT - Sorry, I reviewed the mat and the Vovosun Thermostat Controller at the same time! The mat by itself gets too warm without being controlled by a thermostat controller. I wrap this around the bottom of the bottle and stick the probe onto the bottle about half way up. It keeps the temperature within a half a degree to a degree according to the thermometer and it seems pretty accurate when checking with the temp strip on the bottle. It's working great and will make kombucha making much easier through the colder months!
Review: I used it to help root some Alocasia corms, and it worked incredibly! I have a cold room too, but these made my corm seedlings very happy.

## Features

- manufacturer: Old Tjikko
- Item Trademark: OLD TJIKKO
- Item Weight: kilograms, pounds, 0.2204622620, 0.10
- Item Category: Plant Seed

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B073PTZCJ4 |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,153) |
| Date First Available | 26 September 2018 |
| Item display length | 20.75 inches |
| Item display weight | 0.16 Kilograms |
| Item display width | 3 inches |
| Manufacturer | Old Tjikko |
| Material type | Other |
| Moisture needs | Moderate Watering |
| Product Dimensions | 14.5 x 8.5 x 5 cm; 100 g |

## Product Details

- **Brand:** VIVOSUN
- **Colour:** Green
- **Material:** Other
- **Pattern:** Solid
- **Shape:** Rectangular

## Images

![Durable Waterproof Seedling Heat Mat Warm Hydroponic Heating Pad 3'' x 20" for Kombucha Tea & Beer Brewing, Fermentation, Seedlings & Plant Germination - Image 1](https://m.media-amazon.com/images/I/61TgC2X9muL.jpg)

## Questions & Answers

**Q: How do you secure this strip around the brewing jar?**
A: I use a rubber band to secure mine. Velcro strips or gaffer's tape would also work. If you're using this to brew kombucha or a comparable drink, whatever you do, don't set the jar on the heating pad, which is what another user recommended. That's the last thing you'd want to do. Doing this offsets yeast growth and will ruin batches. The variance in temperature throughout the container will also be greater.

**Q: I'm thinking of  this or the larger one for inside a little house I ordered for a feral cat, would it be adequate in frigid temps? It won't come insid**
A: Not a good choice as a heating mat for cats, because it will heat to 2 degrees above the cats body temperature.  I know this because my own old kitty, got on this mat when I was moving my dragonfruit babies from the mat to pot them up, said cat laid on it for the heat.  I let her do it for quite a while, even tho I knew it would get too hot for her.  She was on and off it, but it really would just get too hot.  So I finally broke down and bought a pet mat and wrapped a couple shirts around it.  That mat was a pet,  K&H 15.75x25.5 and sold on Amazon for 36$.  My old cat can lay on it all day without burning up.  This plant product wasn't intended for that much heat, it did ok, but works better for the purpose it was designed for.  Hope this helps, but I wouldn't do it myself, if only temporary until you could get a better "for pets" heated waterproof mat.

**Q: How long can it be plugged in for?**
A: Mine stays plugged in literally 24/7. I use it to start pepper seedings in January so I can't shut it off. I have had no issues with the surface underneath it overheating.

**Q: I have a 1 gallon glass jar for brewing kombucha in. Does the size of the mat make a difference? If so, which size is best - 3" x 20" or 10" x 20"?**
A: 10 by 20 is the best surface coverage. wrap it around the jug, not jug on top

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by S***Y on 11 September 2020*

EDIT - Sorry, I reviewed the mat and the Vovosun Thermostat Controller at the same time! The mat by itself gets too warm without being controlled by a thermostat controller. I wrap this around the bottom of the bottle and stick the probe onto the bottle about half way up. It keeps the temperature within a half a degree to a degree according to the thermometer and it seems pretty accurate when checking with the temp strip on the bottle. It's working great and will make kombucha making much easier through the colder months!

### ⭐⭐⭐⭐⭐ Review
*by J***N on 22 January 2026*

I used it to help root some Alocasia corms, and it worked incredibly! I have a cold room too, but these made my corm seedlings very happy.

### ⭐⭐⭐⭐⭐ Review
*by L***R on 10 November 2025*

I have 3 of these types of strip heating mats. I use them to go around my gallon sized kombucha jars during the winter and they work fine. They keep my fermenting kombucha at just the right temperature. Two of these mats I've had for years and only purchased another one fairly recently. I find them to be very useful and am very pleased with them.

## Frequently Bought Together

- VIVOSUN Durable Waterproof Seedling Heat Mat 3" x 20" UL & MET-Certified Heating Pad for Hydroponic, Kombucha Tea, Brewing, Fermentation & Plant Germination
- VIVOSUN Digital Heat Mat Thermostat Controller, 40–108 ºF 1000W for Reptiles, Seedlings, Germination, Incubation and Fermentation
- VIVOSUN 2 Pack Durable Waterproof Seedling Heat Mat 10" x 20.75" UL & MET-Certified Warm Hydroponic Heating Pad for Germination, Indoor Gardening, Greenhouse

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-02-09*