What size heater do I need for a 40-gallon tank?
937641
A 150 watt heater should suffice for this size of tank if you are going to keep tropical fish not cool water varieties (such as goldfish). The main thing to remember is to keep a constant temperature and water conditions. I listed below a few good websites for beginners. My advice is to do a lot of research on the fish you want to keep and set the tank up appropriately to the types you want to have. Also remember to cycle your tank before adding any fish and after the tank is up and running do regular water changes and tank maintenance. Source: http://www.firsttankguide.net/ http://www.thinkfish.co.uk/community.htm... http://www.aquaticcommunity.com/ http://www.fishlore.com/
937642
The capacity of whatever heater you consider should be listed on the package of the heater.
875603
It says on the package up to 55 gallons. I have a 55 gallon and a 29 gallon and I have no problems. It will be perfect for your 40 gallon.
1231867
you would be better off looking at a 25 watt heater the hydor theo is a good option for nano tanks
1631895
The Aqueon is been unreliable for temp, I bought a Eheim heater and its holding temp well, for a tank your size the 300w should do the trick, rated for up to 250g
1272947
Look at the size chart, 300-watt only good to 80-85 gallons. You would need something like 2 500-watt heaters or 1 1000-watt heater. Good luck.
1231869
I am using 150w for a 40 gal tank (but it has only about 20 gal water in it).
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.
215085
I'd go with with two smalls or a medium depending on the dimensions of your tank. I have a small on one end and a medium on the other for my 80 gallon tank and it works beautifully.
1971814
55 gallons to 90 gallons. It is not suitable for a 10 gallon tank (as one reviewer mentioned). The heater is too long to fit in smaller tanks, and has far more wattage than needed for anything less than a 55 gallon.
153881
We use ours for our whole house (1200 sq ft), so you might consider just replacing the 50 gal water heater. Use the Stiebel Eltron website to size a unit to your house specifics though. http://www.stiebel-eltron-usa.com/chart_tempra.html
548238
One gallon tank? This would be seriously too much for that. I'm using it in a 26 gallon tank. There must be smaller and cheaper heaters for small tanks.
2073919
Kellie is correct. I have a 40 gal tank for my RES and I try to keep the temp at 76. I bought the 150W model an it just spends 95% of its time shut off. I am planning on downgrading to a 100 W so that it can spend 90% of its time shut off and still hold the right temp. The other benefit is that the lower wattage ones are shorter -- my turtle loves to squeeze in and pry the heater off the wall so a shorter one will be more difficult.
297224
I have a 45 gallon. Your best bet is to find out how many inches deep & wide your tank is.
2176232
Unknown I use a 500 gal tank but it would depend on outside temp and how warm u wanted it I have a friend who had a old style unsafe heater and he got another one I had because what he had was so dangerous. It is a great heater I have 2 30000 btu heaters also in my barn they are great I highly recommend them
875602
I have a 10 gallon and this one is way big for me. Should work on a 40 gallon without an issue
650596
1 heater is perfect cause it is a small tank. More then one would just crowd the space
2106615
yes this would work well for a 40 gallon aquarium, the cascade is 1000 recommended for aquariums up t o 100 gallons. so if you have a 40 gallon i would recommend the cascade 700 this will work great and it will save you money.