Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to cure betta fish diseases [title] Notice if your fish's fins look clumpy or your fish is not as active as he usually is. [step] Your betta may also have a paler hue than normal and white or cotton-like patches on his body. These are all signs of a fungal infection.

Ending1: Fungus can grow in tanks that are not treated with salt and aquarisol once the tank water is added. [substeps] The fungus can spread quickly from one infected fish to the other fish in the tank so it should be treated right away. Ending2: [substeps] If you notice your betta's fin becoming dull or fuzzy, this is often a sign of fungal infection. If you notice any growth that looks brown, odorless, or limp, move it to a checked, screened area. Ending3: [title] Notice if your betta often urinates or defecates on or below the surface of the water. [step] These symptoms are signs of another illness, or a bacterial infection. Ending4: If your betta has a fungal infection, he will suddenly lose his gills and head down into the water slowly and without resurfacing. If you see this happen, then your betta has already got a fungal infection.

Answer format: ending1/ending2/ending3/ending4