Water Temperature Options

[yckhor]

Hi, all.

I had recently purchased a 4' x 1.5' x 1.5' tank with sump.
however, I discovered that the water temperature is pretty high.
I can feel the water to be warm even in the morning.
Questions:
1. Do I need a chiller to cool down the water temperature?
2. What is the optimum water temperature for gold fish?
3. What type of lamp should be used? 6500K is for planted tank right? what about goldfish?
4. How many hours per day should we switch on the light?

I found that the GFs swim more lively in my outdoor tub that has a much lower water temperature, now that I move all except one calico ranchu. Please advice whether a chiller is necessary?

Was told by LFS (myth?),
1. chiller keeps water cool at 26 degree which is good to keep GFs colour?

Thank you for your kind advice.

P/S: great to see RG back online. Was shocked to see it went offline.... keep up the good work.

[CyberET]

my outdoor tub goes up to 32 deg during a hot day, and down to 25 deg at night, my fish ok le, growing well.

will you be using a heater to warm the water up to 28deg before u change water?

har? i thought GFs u buy from lfs most of them are imported from 4 seasons china?

[engliang]

my outdoor tub goes up to 32 deg during a hot day, and down to 25 deg at night, my fish ok le, growing well.

will you be using a heater to warm the water up to 28deg before u change water?

har? i thought GFs u buy from lfs most of them are imported from 4 seasons china?

Hmm...I'm just saying if there is a thermostat heater to maintain a constant temp for the goldfishes instead of subjecting them to 7C fluctuation, isn't it better?
And too low temp can cause ICH right?

As for changing water, just add the water, and the heater will adjust the temperature accordingly right?

I'm comparing wild-bred fish and domesticated aquarium fish, feel that they don't exhibit simlar characteristics and traits.
I know gfs are coldwater fishes and they can withstand 4 seasons.
However, I don't believe domesticated gfs are as hardy, you can try putting ur goldfish in a bowl, and put it into the fridge, and observe whether it is comfortable.

Just my personal opinions, no offence ok. =)
Me just newbie, of course can't be compared to the experts here lar, me just saying my views.

[CP]

Hmm...I'm just saying if there is a thermostat heater to maintain a constant temp for the goldfishes instead of subjecting them to 7C fluctuation, isn't it better?

In Singapore context, I believe that it is better to subject them to a 7 -8 degree daily change in temperature.It makes them stronger.

But, sudden temperature changes such as during a water change should be avoided.