- Beginner Freshwater Aquarium (http://www.tropicalfishkeeping.com/beginner-freshwater-aquarium/)
- - Water Temp. Question (http://www.tropicalfishkeeping.com/beginner-freshwater-aquarium/water-temp-question-9370/)
Water Temp. Question
Hello. I just had a question about the water temperature in my new aquarium. We just setup a 75 gallon tank a few days ago and are just started cycling the tank. The tank is not in a spot where it recieves direct sunlight. I have a digital thermometer with the sensor about halfway down and on the end of the aquarium. The heater is approximately in the middle of the aquarium-. It is a 300w (i think) Rena submersable heater.
I've noticed the temperature fluctuates throughout the day slightly. It's just in tenths of a degree and usually ranges from 75.9 to 76.5. My question is...Is this too much of a tempereature change to be happening daily? Should I think about getting another heater? I've seen a lot of people suggest having two heaters anyway, but will having two stablize the temperature more? The aquarium is going to be a freshwater community aquarium.
No, I think you're fine. That's only .6 degree swing. What you want to avoid are large temp. swings (like 5-10 deg.) that happen quickly. But small fluctuations throughout the day are ok.
Most people have 2 heaters just so they have 1 as a backup in case one fails. If a heater fails overnight and the temp drops drastically that could be fatal to the fish if they get too chilled.
Thanks Jeaninel, that makes me feel a lot better. I haven't had an aquarium in about 6 or 7 years and never one so large. I guess I was used to the glass thermometer that I couldn't see small tenth of a degree changes on. I think I am going to get a second heater though to have one for backup. Should I get one that is the same power as the one I currently have? Would having two 300w heaters be too much for a 75g?
I think two 300w should be ok. That way if one fails the other should be able to handle the load on it's own. With both running they just have to work less to maintain temp.
If I'm wrong maybe someone could correct me here.
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