I have had these go bad on me didn't get more than 2 years out of them Can anyone recommend a better brand?

I change mine every two years. You take a glass and rubber device, submerge it, watch it heat and cool many times per day and expect it to live forever. Won't happen.

Does this fit in a 10gal tank?

It will fit, but it's too much heater for a ten gal.

Is EHEIM Jager Aquarium Thermostat Heater 100W fully submersible in water?

It is completely submersible. If it isn't submerged, the automatic shutoff may kick in. It will work vertically or horizontally. I installed all of mine horizontally behind the rocks so they aren't visible.

Is this good for a nano tank?

This is good for a 20-30 gallon tank. Most nano tanks are much smaller and stand the chance of overheating. Even if that didn't happen they would cycle a lot and wear out quicker. Also, they are pretty long and most likely would not fit in a nano tank.

Eheim Jager Aquarium Thermostat Heater 100w Pack Of 1

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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$72.85

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Description

🔥 Keep your aquatic world perfectly cozy with precision and safety! 💧

BUILT TO LAST - Shock-resistant, shatterproof glass ensures durability in both fresh and marine water environments.
INSTANT STATUS CHECK - On/Off indicator light gives you quick visual confirmation of heater activity—no guesswork needed.
SAFE SOUND OPERATION - Automatic shutoff protects your aquatic ecosystem by preventing heater damage when water levels drop.
FULLY SUBMERSIBLE FREEDOM - 100% waterproof design means you can place the heater anywhere in your tank for optimal heat distribution.
PRECISION PERFECT TEMPERATURE - TruTemp dial lets you recalibrate within ±0.5°F for aquarium climate control that’s always on point.

The EHEIM Jager 100W Aquarium Thermostat Heater is a fully submersible, shock-resistant heater designed for tanks between 26-40 gallons. Featuring a TruTemp dial for ±0.5°F temperature accuracy and an automatic dry-run shutoff, it ensures precise, safe, and reliable heating for both freshwater and marine aquariums.

Specifications

ASIN	B003SNU1I2
ASIN	B003SNU1I2
Best Sellers Rank	#56,795 in Pet Supplies ( See Top 100 in Pet Supplies ) #140 in Aquarium Heaters
Brand Name	Eheim
Color	RED
Customer Reviews	4.4 4.4 out of 5 stars (1,276)
Date First Available	June 14, 2010
Date First Available	June 14, 2010
Included Components	All
Item Dimensions LxWxH	0.00 x 1.42 x 12.56 inches
Item Package Dimensions L x W x H	16.61 x 2.56 x 2.09 inches
Item Weight	10.24 ounces
Item model number	3614090
Item model number	3614090
Manufacturer	Eheim
Manufacturer	Eheim
Model Name	EHEIM JAGER THERMOSTAT AQUARIUM HEATER, 100-WATT
Number of Items	1
Size	26-40 US Gallons
Specific Uses for Product	Heating
Target Audience Keyword	algae-eaters, arachnids, arthropods, bats-animals, bearded-dragons, bees, beetles, betta-fish, bottom-feeder-fish, butterflies, cichlid-fish, crabs, dragonflies, fish, frogs, geckos, goldfish, hermit-crabs, iguanas, insects, invertebrate-fish, ladybugs, lizards, mollusks, newts, octopuses, rays, reptiles, salamanders, sharks, snails, snakes, spiders, tortoises, turtles
Warranty Description	Please See Manufacturer Website

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