Posted by Freshwater Aquariums in Heaters | 5 Comments
ETH 300 In-Line Heater UL 300W f/16mm & 5/8″ Hose
ETH 300 In-Line Heater UL 300W f/16mm & 5/8" Hose
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 List Price: $63.99 Sale Price: $52.99 Availability: Usually ships in 24 hours Eligible For Free Shipping 
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Product Description
Features: The Hydor ETH in-line external heater is designed for most aquarium applications involving water hose of the specified diameter. The most common application is for use with canister filters as shown above, however the ETH is easily adapted for use in almost any situation where heated aquarium water is required, such as with wet/dry sump pumps. The ETH is easily installed by cutting the tubing and connecting the two parts of the tube to each side of the ETH. For reduced cleaning maintenance, it is recommended that the ETH be installed within the filter?s output assembly. As most canister filters are not designed to bear weight, it is recommended that the ETH be properly supported by the use of the attached loop to avoid stress on the output assembly. The ETH is completely safe and UL listed. There is no danger of damage if the ETH is left running dry for short periods as the ETH will switch itself off in that event. The ETH heats with high efficiency by means of an internal heat pump system that avoids temperature variations. For use in freshwater and marine aquariums. Fits most canister filters such as the Hydor Prime, the Rena Filstar, Eheim canisters, and the Fluval canisters with the use of a short section of tubing to complete the connection. Use of the ETH cleaning brush is recommended. Two year guarantee.
Details
- Suitable for marine and tropical aquariums
- Easy to use
- High precision electronic temperature control
- For external use
- 5/8 inch hose
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Rating
I am a long time fish keeper now specializing in discus. I have owned just about every brand of heater in my over thirty years in the hobby. No heater I have even owned is comparable to this one. It is quite simply far better than any other aquarium heater. Easy to set, accurate, holds temperatures extremely stable. It must be used with a canister filter which I notice the Informational Blurb does not include, but if you run a canister filter on your aquarium this is the one to own.
Rating
Bigger than I suspected it would be, but it works fabulously. It does have 3/8″ ID connectors which was not convenient for all my other 1/2″ OD stuff so I had to make a trip to the hardware store. Other than that – it’s doing a great job!
Rating
This product works great I have a reef tank and I have been runing the heater for about a month now and it holds the temp right on target
Seller was very fast with the order came in 4 days with 7-10 day shipping That was great…………..Thanks so much for everything!
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I have used this heater for about 2 years with a 50 gallon tank and it worked well until it started leaking. My ground fault circuit kept faulting when I plugged in the heater, and on closer inspection there was a small amount of water leaking from the heater casing which must have caused an internal short.
I am going to use another one even after this experience because I really like having an external heater for my tank and this is the only one I have found which fits the bill.
Anyone who doesn’t run on a ground fault circuit I highly recommend one!
Rating
I used this heater on a 50 gallon planted tank running inline with a rena xp3 canister filter. When I switched my tank over to start reef keeping it just didnt seem to work any more. It was only 6 mos old when it croaked. I still have it but haven’t tried it again in a year. I am thinking that my initial reef tank was too small and there was not enough tank volume for it to work properly. I now use a Catalina 500w titanium heater in the sump of my 60 tall reef. I wont buy another one I cant trust its reliability now. I have a 3000.00 reef system and need reliable equipment.