Is light important?

[chauloom]

I have neons, and i had been on holiday for the weekend. i came back, put the light on, and my bubbles , I noticed that all my fish looked dull.
There was one tigerbalm, that was in the plant looking dead. So i grabbed my net and poked it, it just floated down to the bottom, then after 10 seconds it started swimming weirdly, i then noticed that my neon tetras didnt have a red underbelly. So naturally i worried about them.
Then 15 minuets later i cam back the tigerbalm was swimming around happily, And the neons where back the their original colour. So all i could think of was the light.

So my question is do tropical fish need light to work?

Btw i came back in the morning and none of my fish where dead, so i know it wasnt a diease.

Thankyou for reading Chloe.

 

[WILDER]

Sometimes when you switch the light on they are pale, and if you have been away without the light on for a while, it might of stressed them abit.

 

[JamesTasker]

You probably startled them switching on the light, neons are paler in the dark anyway. When you switch on the light, make sure the room light has been on a while first, especially if the light has been off several days.