what size heater for a 30 gallon fish tank
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.
1536123
IF you have a house that gets cold, say 50 degrees at night then I'd get a 125-150 watt, however most situations a 100 watt will do just fine. The larger heater will not over-heat the aquarium, unless you get a very large one , say 200-300 watt heater. The temperature of the water would not be held at a steady state and the huge heater would have a tendency to slightly overheat a little just because it is larger in size and has more mass to it. This would cause some cycling of the temperature.
1536124
I would go with a 150 watt heater just in case you need more heat to treat a disease later on besides more watts will be able to heat the water faster and maintain the temperature easier where low watt heater will stay on much longer, But it also depends on the temperature you have in the room where the tank is kept.
1536125
Do some research, but the recommendation fr a 50-75w is ridiculously low. The minimum in a 30g tank would be 100 watts if you're just looking at a few degrees above ambient temperature. If you want to maintain more than five degrees above, then you should go with a 150 watts. Although it is more expensive to do, some people with larger tanks start looking at two smaller heaters, so maybe a 100 on one side and a 50 on the other, or a pair of 100s, so that your tank holds a reasonable temp if one fails and the wider spread of heating can help things even out better.
30723
no prob I have a 30 gallon long & 3 red ears the need filtering & heat light & enough space to put a rock to climb on to bask good luck
2038306
You will need a regulator (like your grill has) , in addition to the tank.We have our heater run off a 500 gallon tank, hard to tell how long a 30 gallon tank would last. I would guess over a month, but just a guess. We love this heater, no regrets.bob
1497044
The higher the wattage, the more water it can heat. As Grizwald said, 200 watts will heat a 100 gallon tank. A 300 watt heater though will not only heat 100 gallons, but it will do it quicker and with more efficiency. The 300 watt heater will also click on less often to heat the water than the 200 watt. This means the 300 watt heater most likely ending up lasting longer than the 200 watt heater, especially if used in a 100 gallon tank.
1588067
I'm using it in a 3 gallon Tetra Cube. As long as it's submerged horizontal or vertically, and not touching substrate, it'll work. The heater is 6.5" tall x 2" wide. I like it because, it heats to a set temperature; if the tank is too warm, it shuts off. I've been using it for a month, checking with a thermometer, and it's been spot on 80, as set for my Betta.
1842356
the uth are only for glass aqariums you can get a 10 gallon fish tank but since the temp drop below in the twenties during the winter i would use a zoomed ceramic heat emitter instead cause the uth does really heat up well enough during the winter season below 60 your best bet would be the che by zoomed for the size glass tank you need they also go by sizes
1734436
It probably won't even fit, but even if it does it would overheat one gallon before the thermostat could shut it off. A 25 watt heater is really meant for a 5 gallon tank or better (3-5 watts per gallon is the general rule). Small volumes of water usually don't provide enough water circulation for heater thermostats to function properly.
786874
Hydor also makes a 25W heater, which works the same, but is smaller and might fit in your tank better.
1356303
I don't recommend 30 Gallons tank. I bought this for 10 gallon tank. It was not enough.And I found a problem. Connection is weak.(from light parts to AC adaptor)
468330
Check dimensions of your tank before you decide, my 250w is fairly long I have. 40 gallon breeder, works well, I think 150 or 200 watt will be okay in your tank but again check dimension of tank and of heater to see if it fits vertically
786875
I use it for a five gallon tank and it is great. A one gallon tank might be to small. Prior to getting this I had a flat heater that was under my gravel that auto censored to keep a tank at the right temp. The only problem with it was I needed to have more control of the temp in the. You might try finding it, sorry but I don't remember what kind it was, but I know it was for smaller tanks.
1492021
Hi. In all honesty i don't know what heaters to use precisely, because the fish that i get don't really need the hearter. I avoid getting high maintenance fish for this tank. I figure its small and simple. So if i was you, i wouldn't get expensive fish. The fish i have is 1 albino pleco, 5neon barbs, 5zebras skinny fish.Thats it. &the tank looks great. They alive since jan 2014.
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
1227274
I had this heater in a 3 gal 360 tank and it kept it too warm. I ended up buying a heater that I could set the temperature.
644644
Yes, that is the size I have. But it did malfunction once and kill one of my fish. It heated to 90 degrees and killed my otto cat (my guppies survived). It hasn't had any issues since. I would suggest buying a thermometer for your tank too so that you can monitor the temp.
1683083
The 10 watt is too much for your tank. I had mine in a 3 gal and it was too warm.
1903385
I can tell you this one worked perfect for my 5-gallon tank: Hydor 25W Submersible Aquarium Heater - Original Theo http://www.amazon.com/gp/product/B0006JLPG8/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1