Inkbird ITC-308S Aquarium Heating and Cooling Dual Stage Temperature Controller Freshwater Saltwater Aquarium Tropical Fish Ornamental Shrimp
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Availability:
In Stock.
Arrives
Saturday, Aug 1
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
Visit the Store Visit the Store Visit the Store Visit the Store Visit the Store Visit the Store Visit the Store Visit the Store Visit the Store Visit the Store Visit the Store 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
Material: Not Available (Manufactured by INKBIRD)
Item Weight: 0.8 kg
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: #45,108 in Pet Supplies (See Top 100 in Pet Supplies) #83 in Aquarium Heaters
#83 in Aquarium Heaters:
Customer Reviews: 4.6 4.6 out of 5 stars (967)
Brand Name: Inkbird
Unit Count: 1 Count
Manufacturer: Inkbird
Included Components: Temperature Controller and probe
Item Length: 5.5 inches
Model: ITC-308S
Part Number: ITC-308S
Display Type: LCD
Color: black
Material Type: Not Available (Manufactured by INKBIRD)
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:
Saturday, Aug 1
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
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 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.
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
Oh my gosh I love this thing. I was worried about any heater I put in the tank malfunctioning and killing my fish. The Inkbird takes over and the probe in the tank tells it when to turn on and off by simply cutting off the electricity to it. This keeps the on/off switch from burning out because it never gets used. I found it to be super accurate right out of the box. One CON: the directions. It was, for me, (not a technical person,) a sort of Where’s Waldo of how do you work this thing? I gave up and asked ChatGPT how to do it. I got walked through it in the simplest manner possible. And did I mention? I love this thing. Now I don’t worry about my betta’s tank temperature.
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Reviewed in the United States on October 26, 2025 by Skabberdink
There are three InkBird controllers with aquarium probes right now (Oct 2020). I've tried the 306, the 306A (wifi), and this 308S in my fresh and salt water tanks. The 308S is the best for aquarium use. The 306 and 306A temp display almost never changes. It may be tracking the temp internally as it changes, but if the display doesn't update, I don't trust it. Even though the wifi feature on the 306A is nice, it has an annoying alarm feature that makes it unusable for my purposes. I use heaters with internal thermostats paired with an InkBird so I have two levels of protection. I set the InkBird target temp slightly higher than the heater's target temp so it will stop a runaway heater. In any other situation, I want the InkBird to keep power applied to the heaters. But the 306A will alarm if the water does not reach the 306A's target temp after a user-selected time ranging from 1-72 hours. There's no way to turn that feature off. The 308S temp display changes frequently by 0.1 degrees as the water temp changes, so it's clear that it actively monitors temp. It will alarm at whatever cold/hot temp you set, but it does not have the annoying time/alarm function. It also has a separable temp probe that can be easily replaced. The downsides are it doesn't have a wifi function, and the max sensitivity for target temp settings is 1.0 degree (instead of 0.1 degree on the others). The temp can be calibrated up or down if it's not reading accurately. The 308S is also for heating and cooling. I use it connected to a heater and a cooling fan for one aquarium. For the others, I don't use the cooling feature, but I connect two heaters to the "heating" outlet using an adapter.
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Reviewed in the United States on October 12, 2020 by JD
Love it! Who even knew this was an option, just happened stumble upon it on Amazon. I use a small fan that blows across aquarium service off and on through the day to help keep temp down as my multiple filters and uv light heat it up a bit. The fan works great though I do have to add in RO water to account for the evaporation from time to time. Before I had fan on a timer for a few hours a few times a day but on cooler days it could be too much and tank temp would drop or go higher then I wanted on hotter days, guess due to tank being close to windows. But with this cooling feature fan only kicks on when my aquarium temp rises one degree and truly makes consistency of temperature in the tank MUCH MUCH MORE STABLE! Only regret is I didn’t know about it sooner!!!! Also the alarm setup is a big bonus, in case my heater acts up or something else. And inkbird is well known for its more precise temperature gauging in comparison with all the crap out there. I have 6 thermometers in my tank, the same brands and other brands and every one ranges 2-3degrees. So ridiculous.
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Reviewed in the United States on April 17, 2025 by DistraughtDragon
I have two of these inkbird controllers and they both work great. Accurate, reliable, and easy to set up. Perfect for my aquariums.
Reviewed in the United States on January 11, 2026 by mcs79
I live in a place without insulation. When it's hot outside, it's crazy hot inside. When it cold outside, it's freezing inside. Whereas I can add clothing, or switch to shorts, my fish need to be keep between 68 to 80F. So if the water temp is above 70, the fans come on, when it's below 68 the heater comes on. Easy set up. You set the temp you want to maintain, the set the + degs temp when you want the cool circuit to turn on, and set the - degs temp when you want the heater to come on. As for the accuracy, it's inline with other thermometers, so I'm assuming it's about right, within a certification, but there is no NIST documentation... so ballpark temps I'm guessing. It has a memory for temperatures when power goes on/off as well. The suction cup, for inside my tank, didn't really attach well, but it kinda sticks. Overall, works perfectly for what I need.
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Reviewed in the United States on September 21, 2023 by Uncl Scott