In shallow lakes that freeze almost to the bottom, fish kills can happen when there is not enough oxygen left in the water. However, colder water can hold more dissolved gas than warmer water can, so water below freezing holds the most oxygen. Then, because fish metabolism has slowed down, they are using less oxygen.

The main body of Lake Tahoe does not freeze. The stored heat in the Lake’s massive amount of water compared to its relative surface area prevents the Lake from reaching freezing temperature under the prevailing climatic conditions.

Explanation: In order for water to freeze, it must reach a temperature of 0oC . This occurs at the surface of a lake, which is why it freezes. However, water, being a special molecule, expands when it freezes, rather than contracts, meaning that the ice on top of the lake is less dense than the water underneath it.

If ice did not float, life underwater would be impossible! It stays on the top and ice slowly gets thicker, freezing our lakes and ponds from the top down. When lakes and ponds freeze, the ice on the surface forms pockets of air and helps insulate the water so it doesn’t freeze solid.

Its more hard to survive, as there is less food, but they often manage to pass the winter. However, if the lake is small or is extremely cold outside and the entire mass of water freezes, all the fish in the lake obviously die.

A 24 hour, 50 degree thaw with winds in the 20-30 mph range can melt a couple inches or more of ice. Holes of several types and sizes are also common after a windy thaw. Heavy rain over 24 hours with only moderate wind will result in about an inch of ice loss.

These 6 Animals Can Freeze—And Then Come Back To Life!

• Wood Frog. The wood frog embraces cold weather and ensures survival by freezing up to 70 percent of its body, including the brain and lens of the eye, according to Earth Touch News Network.
• Arctic Wooly Bear Caterpillar.
• Alligators.

Incredible moment a frozen tuna fish is brought back to life after being defrosted with warm water. Footage has emerged of a frozen fish being ‘brought back to life’ after being defrosted in warm water. Fish can survive this kind of freezing cold because they contain ‘antifreeze’ proteins in their blood.

Take your fish in your hands and place it in cool water from the fish tank. The oxygen in the water will help the fish breath and thus, revive it. More often than not, if you place the fish back in its own fishbowl, the water will fill life back into your weakfish. Fishes take in oxygen using their gills.

two days

Caught early enough a fish can recover, even from a surprisingly dry state. However, how you handle the fish immediately on discovery is crucial to its survival. The first thing to do is get the fish back into some water, but in a safe environment. Simply dropping the fish back in to the tank is a bad idea.

Water changes will not effect the growth of the beneficial bacteria in your bio-filter. Removing your sick fish in this case will not do a bit of good. In an established, cycled tank, removing sick fish is often a good idea.

Sick fish

• Loss of appetite.
• Weakness or listlessness.
• Loss of balance or buoyancy control, floating upside down, or ‘sitting’ on the tank floor (most fish are normally only slightly negatively-buoyant and it takes little effort to maintain position in the water column)
• Erratic/spiral swimming or shimmying.

Sadly, a dead fish cannot be revived. However, all is not lost if you have lifeless fillets aging somewhere in your freezer since last summer. These fish are losing their table-quality as each day passes.

There are two types of salt that can be beneficial to fish – Epsom salt and Aquarium salt. Both the salts remove wastes and toxins from the fish body and help it to heal. You can add 1 tablespoon of salt per gallon of water. Then, keep your fish in salt water for 2 to 3 minutes.

Did the water change kill the fish? Because the fish live in the water, and the changes happen slowly, they adjust to it. When a sudden, large water change occurs, it causes such a drastic shift in the makeup of the water that the fish often cannot tolerate it and they die.

How do you treat swim bladder disease?

1. Treat a bacterial infection with an antibiotic.
2. Treat parasites with copper or medication specifically labeled to kill parasites.
3. For rapidly changing water conditions, identify the problem causing the changes, and eliminate it.
4. The cure for poor water quality is water changes.

Home Treatment for Fish with Swim Bladder Disorder Depending on the cause, swim bladder disorders may be temporary or permanent. If your fish has a permanent swim bladder disorder, they can still live a full and happy life with some lifestyle modifications.

Swim bladder disorder is when a betta has a disrupted swim bladder. This can be caused by overfeeding or it can occur with younger bettas when their swim bladders are not yet fully formed. This disorder is commonly seen in betta keeping and it usually just goes away by itself. It’s not contagious.

The disease is most common in fancy goldfish breeds and betta but can strike virtually any species of freshwater aquarium fish. Fortunately, swim bladder disease can be treated quite easily hence does not have to be fatal.

As mentioned it’s not a treatable disease, merely a result of short-bodied fish with bent swimbladders accumulating air. The real remedy is not to feed for 24 hours.

After 3 days you should check to see if your betta is improving. Sometimes this in itself is enough to cure swim bladder disease but if not, don’t worry. If your betta still has the symptoms of swim bladder after 3 days begin feeding him cooked peas.

As it is not actually a disease, swim bladder problems are not contagious. If one fish has a problem, your other fish won’t “catch it”. However, they may still be at risk of developing similar problems. But, before you try to cure your fish, read on to find out more about treating swim bladder problems.

The impaired buoyancy in fish is caused by a malfunction of their swim bladder. When affected by Swim Bladder Disorder fish will often lose the ability to properly swim. They will float uncontrollably to the top of the aquarium, turned upside down, while still being alive.

Using Epsom salt for a swim bladder treatment It works mainly for bacterial infections, and a proper medication might be more effective. Betta swim bladder epsom salt treatments can be tried if you already have some. The dose is 1 tablespoon for every 5 gallons of water. This is the general recommendation.

If you recently introduced new fish or plants into the aquarium, you may have introduced a disease or parasite. I hope it’s something temporary; if he keeps acting hungry, that may be the case. The partial water change was probably one of the best things you could do.