Inkbird ITC-308S Aquarium Heating and Cooling Dual Stage Temperature Controller Freshwater Saltwater Aquarium Tropical Fish Ornamental Shrimp
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Features
- Heating and Cooling: Controls both a heating and cooling (such as refrigeration) device at the same time; This controller can also be used to easily control a single heating or cooling device
- Applicable Scene: Because it has the powerful function of corrosion protection, it is very suitable for fresh water, sea water aquarium, coral cylinder, ornamental shrimp and tropical fish
- Dual Display Windows: Display the measure temperature and set temperature at the same time; Provides a temperature display of Celsius or Fahrenheit
- Alarms: High and low temperature alarms; sensor failure alarm; Maximum output load: 1200 W (110 V)
- Input Power and Temperature Control Output: 100 to 240 VAC; 50Hz or 60Hz; Max. 10 A, 100 to2 40 VAC
Description
ITC-308S is an easy-to-use, safe and reliable dual relay output temperature controller. It can be used as overtemperature protection and automatic temperature control system for various electric appliances such as equipment for home-brew, aquarium, pet breeding, incubation, BBQ, seedling heat mats, oven temperature control, terrestrial heat control, constant temperature cycle of heating pump, culture fermentation, accelerating germination, electric radiator, electric oven, etc. Controls both a heating and cooling/refrigeration device at the same time. This controller can also be used to easily control a single heating or cooling device. Main features: Package Content:
Color: black
Brand: Inkbird
Product Dimensions: 6.7"L x 2.6"W x 1.2"H
Item Weight: 0.8 kg
Display Type: LCD
Product Dimensions : 6.7 x 2.6 x 1.2 inches; 1.76 pounds
Item model number : ITC-308S
Date First Available : April 25, 2019
Manufacturer : Inkbird
Best Sellers Rank: #27,720 in Pet Supplies (See Top 100 in Pet Supplies) #56 in Aquarium Heaters
#56 in Aquarium Heaters:
Customer Reviews: 4.5 4.5 out of 5 stars (986)
Brand Name: Inkbird
Unit Count: 1 Count
Manufacturer: Inkbird
Number of Items: 1
Included Components: Temperature Controller and probe
Item Length: 5.5 inches
Model: ITC-308S
Part Number: ITC-308S
Display Type: LCD
Color: black
Item Dimensions L x W x H: 6.7"L x 2.6"W x 1.2"H
Item Weight: 0.8 kg
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Oct 5
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
The Inkbird ITC-308S has been an excellent addition to my aquarium setup. It keeps the temperature stable and accurate, giving me peace of mind that my fish are protected from temperature fluctuations. Setup was simple, the display is easy to read, and the heating and cooling functions work exactly as expected. The build quality feels solid, and it has been running reliably without any issues. If you want better temperature control for your aquarium, this is definitely worth it. Highly recommended!
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Reviewed in the United States on July 29, 2026 by Emanuel Rodriguez
I recently purchased the Inkbird ITC-308S Aquarium Heating and Cooling Dual Stage Temperature Controller to maintain optimal temperature conditions for my aquarium, and I must say that this product has exceeded my expectations in every way. Here's why I highly recommend it: Temperature Control: ★★★★★ The Inkbird ITC-308S excels at accurately regulating the temperature in my aquarium. Whether I need to heat or cool the water, this dual-stage temperature controller does the job flawlessly. With its built-in dual relays, it can seamlessly switch between heating and cooling modes, ensuring that the water temperature stays within the desired range. The precise temperature control not only provides a stable environment for my aquatic pets but also contributes to their overall health and well-being. User-Friendly Design: ★★★★★ The user-friendly design of the Inkbird ITC-308S makes it incredibly easy to set up and operate. The intuitive interface allows for quick temperature adjustments, and the large display screen provides clear visibility of the current temperature and settings. The included temperature probe is long enough to be placed exactly where needed, ensuring accurate temperature readings. Additionally, the controller has a memory function that retains the settings during power outages, eliminating the need for manual reprogramming. Reliability and Durability: ★★★★★ The Inkbird ITC-308S boasts outstanding reliability and durability. It is constructed with high-quality materials that can withstand the demanding conditions of an aquarium environment. The solid build of the controller and its components instill confidence in its long-term performance. I have been using this controller for an extended period without any issues, and it has consistently maintained the desired temperature without fluctuations. Safety Features: ★★★★★ The safety features integrated into the Inkbird ITC-308S provide peace of mind. It has a built-in temperature difference alarm that alerts me if the temperature deviates from the set range, preventing any potential harm to the aquatic life in the tank. Additionally, the controller has a delay protection function that ensures the connected heating or cooling equipment is not subject to frequent on/off cycles, prolonging their lifespan. Versatility: ★★★★★ The Inkbird ITC-308S offers versatility and can be used for various applications beyond aquariums. Its dual-stage temperature control makes it suitable for controlling temperatures in a wide range of environments, such as fermentation chambers, greenhouses, and reptile enclosures. This versatility makes it a valuable tool for hobbyists with diverse needs. Inkbird Customer Support: ★★★★★ I had a positive experience with Inkbird's customer support team. They were prompt, responsive, and helpful in addressing my inquiries. Their commitment to customer satisfaction further enhances the overall positive impression of this product. In conclusion, the Inkbird ITC-308S Aquarium Heating and Cooling Dual Stage Temperature Controller has proven to be an exceptional device for maintaining precise temperature control in my aquarium. Its reliable performance, user-friendly design, safety features, versatility, and excellent customer support make it a standout product in its category. I highly recommend the Inkbird ITC-308S to anyone in need of a reliable and efficient temperature controller for their aquarium or other temperature-sensitive applications.
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Reviewed in the United States on June 6, 2023 by Secondhand-Merchandise
I have been using the Inkbird ITC308S for about two months now and it has been an essential tool for my and my reef aquarium. This particular controller has both a heating and cooling outlet, although I haven’t connected or needed a fan for cooling yet due to the weather. My reef is about 50 gallons total display and sump. It’s a basic sump with only 3 compartments. I have the controller's probe in the middle chamber with the refugium, controlling a 200w Eheim heater in the next chamber with the return pump. I have my heater set at 78 degrees and the controller set to turn on at 76 and shut off at 79. This gives me one layer of redundancy by causing the heater's power get cut if it gets stuck in the on position at 79 degrees. Eventually when the weather gets hot I'm going to set up a fan to kick on if it his 79 degrees. The inkbird was very accurate out of the box, tested with 3 different thermometers. It gives me the peace of mind to know that if the heater gets stuck in the on position, it won’t overheat the tank, and that if it gets too cold or hot, the alarm on the inkbird will let me know. The probe is replaceable so that’s a bonus knowing I can replace it if it fails. It is also an upgraded coated probe that makes it more durable especially in salt water aquariums. I have since gotten a second unit to install on my 10 gallon AIO for more protection from temperature swings, as a lot can go wrong faster in with the smaller volume. The reefing hobby is pretty expensive and no matter how much money you spend on a heater, they will eventually break. Why trust you heater to protect hundreds or even thousands of dollars worth of living things? The Inkbird will not break the bank and is a great alternative to buying an expensive Neptune Apex or something similar. The only improvement that I would love to see is for Inkbird to make a WIFI unit with heating and cooling outlets, duel REPLACEABLE rubberized probes for redundancy, and maybe a dimmable display. Inkbird has multiple versions that have some combination of these features, but not all in one. The inkbird was sent to me for free for review, but it was something I was going to buy regardless. I'm planning on starting a frag tank this year and will get another Inkbird unit for that as well. This product is highly recommended.
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Reviewed in the United States on January 15, 2020 by Jordan M
Great temperature controller. I use this for my betta in his Fluval Spec V, and stick the probe in the return pump section, where I have a Cobalt Neotherm 50W heater. This temperature controller gives tons of options, and is a great safety net for a faulty heater. Most heaters will fail at some point, and this will help save your tank. You can set a target value, and a heating or cooling differential/range that tells the controller when to kick on/off heating and cooling units. The adjustable hot/cold alarm feature is cool as well, and fairly loud. One note when using with a “smart” heater that has integrated temperature shut offs: set the Target Value on the Inkbird to higher than your actual target value in the water, such that it will only cut power to your heater if it gets too warm. Don’t have the Inkbird’s Target Value set to what you actually want the water to be. Doing so will flip your heater on and off pretty often, which isn’t good for the heater. Ideally, you’d want this controller to only turn off your heater in the event that it overheats the water. Besides that, operation and programming of the Inkbird is pretty straightforward, and I like that the probe can be removed and replaced if broken. The unit takes a new temperature reading every few seconds from what I’ve seen, so no worries on lagging. Overall, a solid product, and I recommend this investment for anyone even considering this product for an aquarium — it means you're already thrown a decent amount money into your tank, and this will help protect your investment.
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Reviewed in the United States on March 28, 2020 by Kevin Chung
Does what it’s supposed to. Alarm never resets though after returning to set parameters. Need to unplug everytime to stop the flashing
Reviewed in the United States on September 10, 2026 by Nim
TL;DR: I bought this as main temperature controller for my reef aquarium system (the heater thermostats will be the backups). Overall it's performed as expected. You can only set on/off points at a full degree F, which is really my only complaint. Full review: I bought this for my 80g reef system. It's in my very cold basement and requires multiple heaters, so I wanted something to turn all the heaters on and off at the same time. So far it's been working exactly as I hoped. There are a few reasons I chose this specific model. First, the probe is plastic, a must for reef tanks. Second, the probe can be changed out; no longer is your temperature controller dead just because the probe wears out or becomes in accurate. The high/low temp alarm function wasn't necessary, but it's nice to have. The controller was pretty accurate. Out of the box, it only required a few tenths of a degree of calibration. I changed the mode to F*, set my alarms, calibrated down a few tenths and was good to go. My chief complaint about this unit is that you can only set the drift point at whole degrees on the Fahrenheit setting. In my case, I set the temperature to 76*, which means that I can only choose 75* or lower as the heater turn on point. I would have preferred to be able to set 75.5* as the heater turn on point, but a 1*F shift in a reef tank is not really that big a deal. Some heater thermostats drift much more than that in their on/off cycles anyway. So yeah, overall very pleased with this. A cheap and easy way to get some basic temperature backup functionality for my tank.
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Reviewed in the United States on February 18, 2020 by chipmunkofdoom2
I got this temp controller for my aquarium, and it’s been doing exactly what I needed — keeping my heater in check and giving me way more peace of mind. The readout is easy to read, and I like being able to set a specific range so I don’t have to constantly monitor things. That said, I wish it came with some suction cups or mounting options out of the box. I had to buy a separate suction cup to keep it in place. The cable also felt a bit short depending on where you’re trying to run it — would’ve been nice to have a little extra length to work with. What I liked: - Keeps my tank at a stable, safe temp - Simple to set up and easy to read - Gives me peace of mind when I’m not home - Compact and doesn’t take up much space What I disliked: - No suction cups or attachment parts included - Cable could be longer for more flexible placement Overall, it works really well and does what it promises. Just be ready to rig your own mounting setup if you want it to sit cleanly on the side of your tank.
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Reviewed in the United States on June 8, 2025 by Ray C.
This is the best piece of mind for aquarium. It works great!
Reviewed in the United States on August 8, 2026 by Tammy