I'm getting a 5 gallon Fluval Chi II tank. Will the 25 watt heat my tank to 78-80? I'm afraid a 50 W will be too much...
1249212
Yes, it should heat a 5g Chi evenly enough, though I'd definitely recommend picking up a small thermometer just so you can always be sure! Heaters are meant to be placed in areas with good water flow to work properly, so if you're further concerned about it, you could always also just add an airstone next to it. (Especially since the Chi II has a taller design, though I've never owned one so I can't say for sure!) A little extra aeration never hurts! :)
1249213
I am going to be bold and opinionated here, but since I have 5 Fluval Edge (6.6 gallon) aquariums And have purchased a Fluval Chi.... I would highly recommend the Edge over the Chi! The Chi allows for too much water evaporation and it can't be left for more than a couple of days as the water level drops below the recommended level for the filtration system to work! Bad design, but we all agree that it has an aesthetic appeal.... To your question, if your aquarium is located in a non-extreme temperature room (does not drop below 55F in winter) then you should be ok with the 25 watt heater. I have both, the 50 and the 25 watt and they are good heaters and easy to regulate/ set. I am going to be bold and opinionated here, but since I have 5 Fluval Edge (6.6 gallon) aquariums And have purchased a Fluval Chi.... I would highly recommend the Edge over the Chi! The Chi allows for too much water evaporation and it can't be left for more than a couple of days as the water level drops below the recommended level for the filtration system to work! Bad design, but we all agree that it has an aesthetic appeal.... To your question, if your aquarium is located in a non-extreme temperature room (does not drop below 55F in winter) then you should be ok with the 25 watt heater. I... » Read More I am going to be bold and opinionated here, but since I have 5 Fluval Edge (6.6 gallon) aquariums And have purchased a Fluval Chi.... I would highly recommend the Edge over the Chi! The Chi allows for too much water evaporation and it can't be left for more than a couple of days as the water level drops below the recommended level for the filtration system to work! Bad design, but we all agree that it has an aesthetic appeal.... To your question, if your aquarium is located in a non-extreme temperature room (does not drop below 55F in winter) then you should be ok with the 25 watt heater. I have both, the 50 and the 25 watt and they are good heaters and easy to regulate/ set. « Show Less
1249214
I have it on my 6 gallon fluval edge so it will be fine. I love this heater because it is the only heater that has build in temperature sensor and you can even set desired temperature. Once the sensor detect the tank temperature match the temperature you set, it will stop heat the water. Most mini heater will continue to heat the tank which result over heat the tank and kill fish.
1249215
Mine worked great with a 4 gallon. It was easy to set and rock solid with the temperature.
1922574
I would go with at least the 50 watt. Probably the 100 would be better. You can always put it a little bit diagonally in the tank. it is ok to fully submerge even the top part.I would consider going with 2 50watt heaters with one on either end of the tank for a more even heating effect. Plus both heaters would last longer because neither one would have to work as hard.
473814
Converting to 'watts' doesn't really have a lot of value. It's a 5W LED, but the LED efficiency, color spectrum, light dispersion, and so on means that another 5W LED might make more or less light, and either might make more or less light than a 15W CFL, . Finnex has a PAR estimator on their site for it, which might be somewhat more useful in comparisons: http://www.finnex.net/index.php/fugeray_r/?___store=default In my experience with it, the color spectrum is pretty reasonable for a planted tank, but probably not so 'hot' for a marine tank.
1652096
The 50w model was designed for 6.6-15.8g aquariums. The full list of their heaters is listed here: https://www.eheim.com/resources/product//450/downloads/11/EHEIM_aquarium_heater_25_-_300_manual.pdf
1075812
No, probably not in the sense you mean. This is an eight watt "always on" type of heater, it has no thermostat. The heater will continue to emit eight watts worth of heat whenever it is plugged in. With very few exceptions all small "bowl" or "betta" heaters work this way, the only difference is the wattage. They are available in 5 to 15 watts, you need to match tank size, ambient temperature, and other variables to heater wattage. A thermometer and monitoring is essential, especially at first to determine what temperature a particular heater keeps a particular tank, and if room temperature rises so will the water temperature. The term "preset" is not really applicable to these heaters, preset heaters have a thermostat that is permanently set at a certain temperature. If a heater description uses the term preset without stating a specific temperature (usually 78) then it is NOT a thermostatic heater- it is an always on type. In too small of a tank or too warm a room these can overheat the water. Bettas are very heat tolerant, which is why using these heaters is feasible, but care is still needed. In anything under 3 gallons I think eight watts may be more than needed unless in a fairly cool room.
1454864
Yes I have been running a 25watt heater for a long time in the back compartment and it is perfect I would recommend upgrading the lighting if you are using it for a reef but other than that it's a great little tank.
344740
I have a 225 gallon tank and I run two 150 watt one on each side and my temp. Stay. At 76
312029
There's multiple sizes selectable here. I prefer yo run two undersized heaters so if the thermostat goes bad i in one it won't cook the fish. For a 39 gallon I'd think you'd want like two 100w heaters.
1560139
No. On average, a heated tank needs about 5 watts of heat per gallon, but bettas are tropical so 7.5 should be fine.
641900
Absolutely overkill for a 5 gallon tank. You need a 50watt at most. A 150watt would likely cook the little guppies.
328609
This heater is much too powerful for a 6.6 gallon. The 50 watt practically boiled my 10 gallon tank (I had the temp dial set to 78 degrees Fahrenheit but the heater malfunctioned and the temp rose above 86 degrees overnight) which, in turn, killed my fish.... These heaters are generally not well made and I would not recommend them. Especially not for small aquariums.
471108
To add to my previous comment... I finally had to put a 2nd heater in my Fluval Edge 6 gal tank in order to maintain the set temp. The room in which I have my aquarium is on the cooler side and is around 65 F... I really like the design of the Cobalt heater and the ease of setting the temp and am sure that it will work better in warmer months to maintain set temp, but it is unable to keep the tank heated under the circumstances. It does not heat any better than the Fluval 25watt heater that I had been using.
1536122
Depends on how much temp change you need. If your ambient room temp is in the high 60's or low 70's and you're looking to get closer to 80*, a 50 or 75 watt will work in a 30g. If you need more temp increase than that, or just want a more efficient heater, I'd look at a 100W.
1928961
Two choices. Either two 100 w heaters at opposite sides of the tank or a 200w should work. These heaters are powerful and heat better than other brands of the same wattage.
783466
I actually love this little tank. I had it as a saltwater pico tank for a while than a treatment tank for freshwater. A little 35 watt heater from Walmart will fit into the return section.
1315618
what size is your tank? I have a 300 watt in my 90 gallon saltwater . Temperature set at 78 and it stays at 78. I ran it at 82 degrees when it was cycling
1683083
The 10 watt is too much for your tank. I had mine in a 3 gal and it was too warm.