What color lights should be used to raise cold-water fish (goldfish, grass carp and koi fish)? White or blue.

One is white and the other is red. The color temperature of the lamp is 6500k- 14000.

If your fish is red or other colors are dark, you can use only two white tubes.

1.2M- 1.5M glass jar and 30W glass jar are enough. No matter how big the jar (pool) is, high-power white halogen lamps should be considered.