Compact Heater for UNS 3N Tank (3g)

[Kobin]

I was looking for a compact heater with a low profile for a UNS 3N tank that I was going to repurpose into a small macroalgae tank. It's currently an opae ula tank. Any recommendations? I was leaning towards getting a small 25w cobalt neotherm but I've had one fail on me in the past

 

[spiderguardnano]

I used this before
AquaMiracle Adjustable 10W Small Aquarium Heater Submersible Fish Tank Heater Betta Heater Turtle Heater Super Mini Aquarium Heater with Digital Display Thermostat, for 1-2 Gallon Tanks https://www.amazon.com/dp/B0B4ZVKSC6?ref_=cm_sw_r_apin_dp_YRQAMG6ETA2ZMY6NPH25

 

[e34John]

I have this in my 12 long, been a few years with no issues.

 

[Kobin]

Decided to go with this one! Thanks for the suggestions.
YukiHalu Small Submersible Aquarium Heater, Adjustable Mini Fish Tank Heater 25W 50W 100W 200W 300W with External Temperature Controller, LED Display, Used for 5/10/20/40/60 Gallons (25 Watts) https://a.co/d/4Q9uBMS