[Dopey113]

Never kept fresh water fish, only marine, but you can stir up algae from the filter or underground filtering system, if you have clean filters and charcoal in then it should clear up

[Goldfinger]

No bogwood either.

It's just a little tank, about a foot cube.

There's no new ornaments in there, just the same 3 little plastic 'trees' and an arch at the back, maybe it is that starting to degrade and dying the tank water...

[ANHBUC]

Take the arch out and put it in some clear water to see if it is that.   

[mobilekat]

Perhaps you have female fish and they are trying to decorate???

 

[ANHBUC]

Perhaps you have female fish and they are trying to decorate???

 

Or overdone it on the lipstick!!   

[Plot74]

Different light condions the temperature of the water .
Both can affect alge blooms .
Test the chemical  elements of the water if you have test kit.
John

[Alastair-I]

Not a clue why, the fish didn't seemed to be bothered, if anything, they looked more 'sparkley' / brighter coloured.

What lighting have you got over the aquarium?  And have you changed the tubes recently? (even just before you noticed the change).

If you take a glass of water out of the aquarium and hold it up to daylight (must be daylight not an artificial light source), does it look pink?  Or does it only look pink when it's in the tank?

A lot of freshwater lamps are a little on the pinkish side - particularly the tropical plant grow lamps, it's possible that a water change and cleaning the glass of algae deposits has revealed the true pinkish tinge coming from the lamps.  If I do a big water change ane really clean the glass of the aquarium thoroughly I'm always rewarded by the tank looking a lot brighter from outside.

[Goldfinger]

No tube changes either.

Think we'll go for the removal of the arch to start with now...

[ANHBUC]

Did you every solve the mystery?  My neighbour was saying her koi pond in the garden had a similar problem and it was the pond food which was pink.  She always used the same brand but the last lot must have been mixed wrongly.

[Paul Plots]

Did you every solve the mystery?  My neighbour was saying her koi pond in the garden had a similar problem and it was the pond food which was pink.  She always used the same brand but the last lot must have been mixed wrongly.

I've just read through and was wondering if the problem had been solved too.

If there have been no additions / changes to the tank other than water it may well, as has already been suggested, be something to do with temperature and/or lighting influencing the growth of algae or (more likely) bacteria.

Apparently this is more common in swimmnig pools than aquariums.

[Goldfinger]

Hi all! Am back, with a new laptop - the other one went for a flying lesson off the dining room table!  :blink:     

Anyway.... A new pump, different food and several water changes later, the pinkyness has stopped.. 

So, blow me on what the cause has been........ 

[Paul Plots]

Pleased to hear you've managed to clear that problem up 

[Goldfinger]

Er, the pink is back! 

But....

We've really solved it this time...

It's the colourant in the food coming out when they poo!

[ANHBUC]

 

My neighbour had a similar problem with her Koi pond and some pink food pellets.   

[Paul Plots]

Er, the pink is back! 

But....

We've really solved it this time...

It's the colourant in the food coming out when they poo!

How delightful  :blink:   Sounds as if water changes are called for.