Yes, it's very common. The dryer the air, the faster it will evaporate.
Because some of the water will slowly evaporate and the tank will dry up if no new water is added.
Salt Water Fish
You should change the water in your fish tank every 1-2 weeks to maintain a healthy environment for your fish.
IN WATER!!!! (TANK!!)
Water, for starters.
You should change the water in a fish tank regularly, typically every 1-2 weeks, to maintain a clean and healthy environment for the fish.
Not unless you had another fish in there.
It is recommended to change about 25-50 of the water in a fish tank every 1-2 weeks to maintain good water quality for the fish.
The white scale on the inside of the fish tank is from a buildup of minerals that were in the water.
The charcoal filter in a fish tank should be changed every 2-4 weeks to maintain water quality and keep the tank clean for the fish.
Most probably the fish will die. Prior to adding any fish to a new tank the tank should be allowed to settle and the filter to become 'cycled'. This process takes about 3 weeks. If you do this, the chloring gas in the water will evaporate off. It is of course possible that you didin't equalise the water temperature and other differences before releasing your fish and that shock is what has damaged the fish.
Betta fish will not be harmed if they are in a filtered tank. If the new tank is about the same size as the old tank you should use the old water or most of it in the new tank. If the new tank is larger so you have to add lots of new water then you should fill the new tank with the new water and let it sit (preferably with the filter running) for two or three days before adding the fish. Also when you move the fish make sure the new tank is at the same temperature as the old tank.