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The only way to improve a fish color for real is with good food with beta carotene, I remember tetra brand having some of them. You can check deeper information about that here: http://www.seacolors.eu/images/NPR_61_46-49.pdf Is not going to be magic and will take some time. You can also use home made food but that's a more complex task as well as more ...


2

I have never had an external filter like this and I have never experienced such a buildup in the filter - I have always been using internal, fully submerged filters - but based on your photo and description of the material being slimy I would say it is a bacterial biofilm that is attached to the precipitated limescale underneath. I do not think it is a ...


2

Limescale is made of insoluble carbonates of calcium and magnesium; in other words, they are salts of carbonic acid. Salts undergo displacement reactions: for instance, weaker acids tend to be displaced from their salts by stronger acids. In case of limescale it means that it is decomposed by acids stronger than carbonic acid (acetic acid, the main ...


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