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.

[The Matrix]

I kept fish in mid western US before. It's a pure nightmare. Morning warn and drop to sub Zero. Water is so hard and changing water is another nightmare. Without the use of heater, really a major problem in winter of sub 10C. A pain in the axx just to think of changing water and travel miles to the nearest Walmart to get some dunno what brand fish food.

But when one visit the real breeding site in China .... just pond and nothing else. Dun expect them to put million watts of energy to heat up the water.

Different places uses different methods. Know the differences, not do what u think is right.