Okay the Betta is alive, but mostly floating do I

Do I take it out of the tank now .. if it is this "bladder" thing .. can the other fish catch it from him ? Do I leave him in the tank overnight to see if he gets better ? .. I don't have an emergency tank .. no other place to put him. I had the water tested about 4 days ago and everything was fine. Anyway .. are the chances good that the other fish get sick if I leave him alone tonight ? Or take him out now ? Thanks ..

Swimbladder is a disease which symptoms cause fish to become unable to swim correctly, your fish may exibit swimming toward the bottom of your tank or bowl, then floating back up, swimming in circles or laying on his side or floating.

There are three main things according to the posts and articles I've read that can lead to swimbladder disease.

Constipation due to overfeeding

Bad water quality

Bacteria

I recommend the following regimine, recommened to me over two years ago.

First, as soon as you notice signs of swimbladder do a 50%water change, taking care not to stress the fish by having the water temp as close to his bowl as possible.

After your water change you should not feed your fish any food for two days. On the third day feed your fish a fresh pea. Frozen peas thawed, popped out of the skin, and cut into bite size pieces. And then do another water change so that any uneaten peas do not contaminate your water.

If you don't use aquarium salt this is a good addition to most tanks. The recommended dose is one teaspoon per gallon, or one tablespoon per five gallons. If you have never added salt and you are unsure; you may want to first acclimate him at only 1/2 tsp per gallon.