01-23-2012, 12:02 PM #1
Introducing a heater to a coldwater tank - what temperature?
I am looking to warm up my coldwater tank slightly (due to the cold temperatures in Scotland at this time of the year) and have purchased a Interpet 150W Delta Therm heater.
Currently, the tank temperature sits at 17 degrees celsius. The heater's lowest setting is 20 degrees celsius, however I have been advised that 22 degrees is a safe temperature for my two fish that live in the tank (one 5 year old comet and one 6 month old shubunkin).
The tank is 70ltrs, so, according to the box, the heater is the correct size for the tank capacity.
Can anyone confirm that 20-22 degrees is a safe temperature for my tank? I understand I cannot raise the temperature more than +- 2 degrees celsius at any one time.
01-23-2012, 12:55 PM #2
Set the new heater as low as it'll go. After a week, raise it no more than a degree, then another the following week until you hit 22. Temp variations are very hard on fishes, hence the very slow raising of it.
DaveWhen a finger points to the moon, the imbecile looks at the finger.
Omnia mutantur nihil interit.
The more you read, the more things you will know. The more that you learn, the more places you'll go
01-23-2012, 01:44 PM #3Originally Posted by Dave66
Thanks for the reply - I have set it to 20, which is the lowest it can go.
As you've suggested i'll bring it up to 21 next Monday.
01-24-2012, 02:18 PM #4
I keep mine at 22C. My goldie seems very happy and active at that temperature.
01-24-2012, 03:43 PM #5
In all honesty, 17 C is not that cold at all. It might be cold on your hands when cleaning the tank, but not for a goldfish. I wish I could get my tanks down to 17 in the winter... I am big into simulating what would happen in the natural environment and I think a winter "cool down" period for temperate and coldwater fish is beneficial to their health and increases their longevity.Support your local ichthyofauna - buy a fishing license!
01-28-2012, 04:33 PM #6
Our goldfish are at 63-65F pretty much year round and they are always happy and active. I personally wouldn't worry about a heater
29 gallon-planted community
20 long frag tank
75 gal-planted goldfish
75 gallon mixed reef with 20 gallon sump