Skip to content

OASE Heatup Aquarium Heater 300 Watt

Marsoni M251S
Sale price$66.99
Pay 4 payments of $16.75 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
OASE Heatup Aquarium Heater 300 WattThe OASE HeatUp line of aquarium heaters are designed for marine and freshwater tanks. For optimal heating, utilize the HeatUp 25 to create uniform temperature levels for your aquarium environment. The control system on the heater allows accurate readjustment of the temperature (+ 6F) and can be adjusted using the included post calibration tool. The temperature scale can be adjusted between 66F 90F. The HeatUp is perfect for submerged use and includes
Easy Shipping

Quick Dispatch:

Your OASE Heatup Aquarium Heater 300 Watt orders ship within 1-2 business days.

Delivery Options:

  • Standard: 3-7 business days
  • Fast: 2-3 business days
  • Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your OASE Heatup Aquarium Heater 300 Watt ships.

Need Help?
Questions about OASE Heatup Aquarium Heater 300 Watt, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for OASE Heatup Aquarium Heater 300 Watt in your area.

Get Shipping Estimates

Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 1057 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
N
Verified Purchase
Nate
Alexandria, US
★★★★★ 5
The coat of warmth
Size: Small, Color: Black
Love the simple style but very elegant. Fit perfectly, I'd say worth of buying, warm you up Good quality. Not too heavy. Good price as well.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 26, 2025
L
Verified Purchase
Linda Schmidt
Belleville, US
★★★★★ 5
My husband loves it!
Size: Large, Color: Black
My husband loves it! Likes the look and quality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 22, 2026
B
Verified Purchase
Bri
Bozeman, US
★★★★★ 5
Great style; unique; fits well.
Size: Medium, Color: Gray
Love the style and the fit. I get a lot of complements wearing this. With only three buttons, wearing this outdoors in the cold might not be practical. Other than that, I like it. I went back and ordered a second coat but in a different color.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 7, 2026
F
Verified Purchase
Fremy
Natrona Heights, US
★★★★★ 4
Nice, mid-length trench coat for style and comfort...
Size: X-Large, Color: Black
I like this mid-length trench coat. The seams are good (on the one I got) and the style is perfect for the office, semi-formal occasions and all-around wear. The fit is good, and the only complaint I would have is the sleeves are a bit too short for my long arms.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 9, 2023
S
Verified Purchase
Sharon
San Leandro, US
★★★★★ 3
It’s ok
Size: X-Large, Color: Gray
This jacket is OK. I bought it for my boyfriend because I really like the coat collar but once it got here. The front fits well but I think the back needs a little more tailoring because it kind of sticks out but he really liked it. He said he could put a heavy sweater up under it. That way he can get more ware out of it. It’s OK.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 21, 2024

recommand products