Pinkish Water?

Hello everybody! I am having same water quality issues. My water always turns pink. I just changed the water a few days ago and the next day the water was pink! Where could the pink be coming from. I have 3 fancy goldfish in a 55 gallon aquarium.

 

First off, do you have any pink/red decorations in your tank? Also, do you notice any wounds on your fish? Can you post a picture of the entire tank too? Thanks.

Good luck!

 

One of my fish (the calico one) lost his tail. A few days ago my other fish ate his tail. He had never been aggressive before. Anyways we got rid of the aggressive fish the next day but bob (the injured one) seems a little lethargic. Here is a picture of the tank
It's really faintly pink, but it's also hard to tell in the picture.
I have a pink plant that I've had for a while however, I'll take it out anyway because I never liked it.

 

Well, it's probably not any kind of dye from decorations or tinged blood from injured fish. Maybe it's some sort of algal bloom? I'm not quite sure.

 

Also here is a picture of Bob, the one without a tail.
Sorry about the glare on the picture!

 

Will it harm them at all? Should I just leave it alone? They seem healthy to me.

 

Could be because of the light?

 

I haven't bought a light for their tank yet. So the only light is the ceiling one. And that light has no pink tint.

 

I haven't bought a light for their tank yet. So the only light is the ceiling one. And that light has no pink tint.

Then how do you know it's pink?

 

I may have worded that weird, sorry. I meant I don't have a lid on the tank with a light, but I do have a light in the room. I can tell the water is pink just by looking at it.

 

I agree, it's probably a type of red algae bloom that's making it pink.

or, it could be what you're feeding them. what colour(s) is the food you're feeding them? are they messy eaters? I know they poop a lot, so maybe their food or whatever is making their poop pinkish, and it leeches into the water.

 

The food we are feeding them is brown so I don't think it's that. If it was an alge bloom what can I do to fix it? Is it harmful to them?