Most aquarium sets come with a strip that you stick on the the tank that looks like a bar and has a number of different temperatures on it. You can go to the pet store and get a thermometer that has a suction cup on it and it sticks on the inside of the tank. It always stays there you just read the temperature that it says there.
Just leave the aquarium at room temperature.
You would use a aquarium chiller to cool the water in your aquarium for certain types of fish that need cooler water then room temperature. It helps to keep the water at a constant temperature.
about ocean temperature.
The instrument that is needed to measure the temperature of the water is called an "Aquarium Thermometer".
"After about 3-6 weeks depending on species and temperature, the babies emerge" see: http://wiki.answers.com/Q/How_do_mystery_snails_reproduce_and_how_many_offspring_can_they_have_at_one_time
Aquarium water should never be hot; depending on the type of fish you keep, the temperature will vary.Goldfish for example are best in 75F, but a betta prefers 80F. Do plenty of research about the fish you are considering for your tank before going out & buying anything.
It will cool down water temperature when by melting down AND it will lift up the water level in the aquarium
I have mine in a heated aquarium that is about 76 to 82 degrees.
First, take it out of the aquarium. Then pour salt on it. they will melt when in contact with salt.
70-82 degree Fahrenheit
Depending On Whether They Are Tropical (Hot Temperature) Fish Or Aquarium Or Outdoor Or Indoor (Cold-Medium Temperature) Fish
100 degrees or maybe in the 70 ranges