OPULENT SYSTEMS Durable Waterproof IP67 Seedling Heat Mat Seed Starting Plant Hydroponic Heating Pad for Indoor Seedling and Germination 10"x20.75" 18W.

I'm using these mats in feral cat houses under their blankets. The inside of their boxes get nice and toasty when they're inside and they stay in most of the colder days. I'm in the deep south so our cold nights never really drop below 30°f but that's still terrible for any critter to try to sleep in. They're inexpensive, waterproof, don't use a lot of electricity, and don't overheat a all space so they're perfect for feral outdoor sleep boxes.

Had for over a week for my ball python. I have it under a 40gallon breeder and it keeps temps between 83-88F. I have it with a thermostat regulator so the temp may get warmer if needed. Im writing a review because our heat went out the last couple nights and before i realized the house was as low as 63F i typically dont put an over head heat lamp on my girl unless the warm spot ambient temp is less that 80F because she does so well without. Anyways when the house was so cold in the 60s the heat pad kept her warm side 80F without additional heat! I am very happy with this and my girl is happy too that she stayed warm. Will purchase again.

Runs warmer than I expected, bought a controller for it - seems that's the other half of most of these kind of things...Build seems decent, just need to watch it like anything you want to grow and starting them up.No problems so far, I'll edit if anything changes.Would buy again.

Works for starting seeds the way I need it to... it's is however, incredibly stiff and difficult to ever get flat in order to use for putting seed trays on top. Much harder than any others I've used. Other products I've found at similar prices and they aren't rigid as these are, I'm not sure that I'll buy again, although they do function.

This unit is just the right size to fit under the large black trays sold as planters or supplied with the little 4/6 packs of starter plants. Heat is just right and will even work in cold rooms. Aux heat will be needed for temps of about 40F/5C and lower once the seeds sprout. Takes very little electricity and waterproof in case of spills.

Bought this heating pad because I wanted to try my luck at planting seedlings for the first time. It's a convenient size, works well so far, and seems to be the perfect temperature for my starter set. The price was great too, as I did not want to spend too much money, being this is my first time planting seedlings.

Flexible heat pad which I used to wrap around the water filters on my RV go prevent freezing. Put an auto temp switch ahead of them and it Works great, wrapped one around each filter canister with a large tie wrap and perfect winterized water system.

Helped my young sprouts grow nicely in my basement this last winter, soon another cycle to start.