Blue-green Tinge in Lungfish Aquarium

[Wiggles92]

I'm not exactly sure where this belongs, so here goes:

The water in my lungfish aquarium inevitably turns green a few weeks after any water change. When I first noticed it, I though that the fake plants that were in the aquarium were leaching their dye into the water, so I removed them but ended up with the same result after the next water change. The remaining decor in the tank consists of a shell, gravel, rocks, and some live plants (Elodea and water wisteria).

Before anyone says "Duh, it's algae," I must point out that the water looks blue-green and is still clear; it almost has the appearance of having been dyed. It also leaves behind a blue-green residue on the tank and anything else that the water touches and dries up on.

Does anyone have any idea what my problem is?

 

[makoshoemaker]

pictures

 

[GolemGolem]

Silly question but did you use any Ich cures lately?

 

[xander]

Possible to get a pic?

Posted on mobile.monsterfishkeepers.com

 

[Wiggles92]

Silly question but did you use any Ich cures lately?

No, I have never used any ich cures in this aquarium.

 

[Wiggles92]

Possible to get a pic?

Posted on mobile.monsterfishkeepers.com

I'll take some pictures ASAP.

Could you please merge this thread with the one with the same name and original post that got moved from the General Discussion section to here?

Edit: Thank you for merging the two threads.

 

[Wiggles92]

Sorry about the poor quality of the pictures, but they get my point across.

Here are some pictures of the blue-green residue.

Here is a picture that demonstrates the overall color of the aquarium.

For a comparison, here is a picture of the water in the aquarium that contains my Florida gar.

Both aquariums were filled with water from the same source and both are filtered yet only one of them has this problem...

This problem doesn't seem to be having any negative effects on the lungfish; it still has the same appetite and has regular bowel movements.

 

[tiddlywinks]

maby some kinda of algea that came from you lungfish? just now starting to grow?

 

[poel_19]

what are you feeding it? it could be dyes in the food the lung isn't processing.

 

[Wiggles92]

maby some kinda of algea that came from you lungfish? just now starting to grow?

I'm pretty sure that it's not algae. It only appears after some of the water from the aquarium has evaporated, and the aquarium has pretty low lighting and good filtration.

what are you feeding it? it could be dyes in the food the lung isn't processing.

I feed the lungfish a variety of foods: beef heart, fish fillets, algae wafers, shrimp pellets, and sinking bottom feeder pellets. I'm not sure if any of those contain significant quantity of dye that the lungfish can't process.