how to calibrate the heater temperature ?

It should come pre-calibrated out of the box. Just plug n play setup.

Will it work in a sump setup?

Yes, it would make a great sump heater.

I have had my 1000w heater in my tank for almost 3 months. Today the controller went dark with a faint flashing light. Does not work what can I do?

Hello, hygger offer one year warranty against any defects, if any problem, please feel free to contact me.

Would 800 watt be too big for 75 galloon tank with 29 gallon sump ? I undertsand it's a lot more than needed but I intend to upgrade to a 180 soon.

I have my 800w in a 75g without any problem. Well, the only thing is, that you must turn it off when doing water change, because at have tank start overheating.

Hg043 | Desertcart Congo

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Sold byAmazon CongoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Keep your aquatic world perfectly cozy — no fish left behind!

COMPLETE SETUP KIT - Includes controller, suction cups, bracket, and hook—plus a 12-month warranty for peace of mind.
SAFETY FIRST DESIGN - Automatic shut-off when water is too hot or heater is out of water—no more boiled fish fears!
DURABLE EXPLOSION PROOF - Crafted with quartz glass and nickel-chromium wire for fast, safe, and long-lasting heating.
USER FRIENDLY LED DISPLAY - Monitor current and preset temps plus alerts without getting your hands wet.
PRECISION TEMPERATURE CONTROL - Adjust from 59℉ to 93℉ with ±1°F accuracy for the perfect aquatic climate.

The hygger Aquarium Heater offers powerful 300W heating suitable for 40-80 gallon tanks, featuring a digital LED controller with precise temperature adjustment and multiple safety protections including automatic shut-off when overheating or out of water. Built with explosion-proof quartz glass and nickel-chromium heating wire, it ensures fast, safe, and durable performance. Complete with mounting accessories and backed by a 1-year warranty, it’s the smart choice for both freshwater and saltwater aquariums.

Specifications

ASIN	B0BF49CGLY
Best Sellers Rank	#5,059 in Pet Supplies ( See Top 100 in Pet Supplies ) #7 in Aquarium Heaters
Brand	hygger
Brand Name	hygger
Color	Black
Customer Reviews	4.2 out of 5 stars 648 Reviews
Included Components	1Heater, 1Controller, 1Controller holder, 3Suction cup, 1*Hook
Item Highlight	with Digital LED Controller and Intelligent Leaving Water Automatically Stop Heating System, for Freshwater and Saltwater
Item Length	10.8 inches
Item Type Name	aquarium heater
Item Weight	2.2 pounds
Manufacturer	hygger
Material	Quartz, Nickel complex, Plastic
Material Type	Quartz, Nickel complex, Plastic
Model Number	HG-043
Number of Items	1
Number of Packs	1
Part Number	HG-043
Unit Count	1 Count
Warranty Description	1 year warranty
Wattage	300 watts

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